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		<h1>Tin lớp 9</h1>
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			<li>Thứ bảy - 24/04/2021 03:13</li>
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			KÌ THI CHỌN HỌC SINH GIỎI HUYỆN LỚP 9<br />NĂM HỌC 2020 - 2021<br />Môn thi: TIN HỌC<br />Thời gian: 150 phút (không kể thời gian giao đề)
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			<h4 style="margin-top:3px"><span style="font-size:12pt"><span style="line-height:130%"><span style="font-family:&#039;Calibri Light&#039;,sans-serif"><span style="color:rgb(47, 84, 150);"><span style="font-weight:normal"><span style="font-style:italic"><span style="line-height:130%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">Tổng quan bài thi</span></span></span></span></span></span></span></span></span></h4>

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			<td style="border:solid windowtext 1.0pt; width:144.9pt; border-top:none; padding:0cm 5.4pt 0cm 5.4pt; height:18.95pt" width="193"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">GIAI THỪA</span></span></span></span></td>
			<td style="border-bottom:solid windowtext 1.0pt; width:86.3pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt; height:18.95pt" width="115"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">GIAITHUA.*</span></span></span></span></td>
			<td style="border-bottom:solid windowtext 1.0pt; width:87.45pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt; height:18.95pt" width="117"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">GIAITHUA.Inp</span></span></span></span></td>
			<td style="border-bottom:solid windowtext 1.0pt; width:82.4pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt; height:18.95pt" width="110"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">GIAITHUA.Out</span></span></span></span></td>
			<td style="border-bottom:solid windowtext 1.0pt; width:71.9pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt; height:18.95pt" width="96"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">1 giây</span></span></span></span></td>
		</tr>
		<tr style="height:19.7pt">
			<td style="border:solid windowtext 1.0pt; width:144.9pt; border-top:none; padding:0cm 5.4pt 0cm 5.4pt; height:19.7pt" width="193"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">FIBONACI</span></span></span></span></td>
			<td style="border-bottom:solid windowtext 1.0pt; width:86.3pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt; height:19.7pt" width="115"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">FIBO.*</span></span></span></span></td>
			<td style="border-bottom:solid windowtext 1.0pt; width:87.45pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt; height:19.7pt" width="117"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">FIBO.Inp</span></span></span></span></td>
			<td style="border-bottom:solid windowtext 1.0pt; width:82.4pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt; height:19.7pt" width="110"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">FIBO.Out</span></span></span></span></td>
			<td style="border-bottom:solid windowtext 1.0pt; width:71.9pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt; height:19.7pt" width="96"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">1 giây</span></span></span></span></td>
		</tr>
		<tr style="height:19.7pt">
			<td style="border:solid windowtext 1.0pt; width:144.9pt; border-top:none; padding:0cm 5.4pt 0cm 5.4pt; height:19.7pt" width="193"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">XẾP TÁO</span></span></span></span></td>
			<td style="border-bottom:solid windowtext 1.0pt; width:86.3pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt; height:19.7pt" width="115"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">XEPTAO.*</span></span></span></span></td>
			<td style="border-bottom:solid windowtext 1.0pt; width:87.45pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt; height:19.7pt" width="117"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">XEPTAO.Inp</span></span></span></span></td>
			<td style="border-bottom:solid windowtext 1.0pt; width:82.4pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt; height:19.7pt" width="110"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">XEPTAO.Out</span></span></span></span></td>
			<td style="border-bottom:solid windowtext 1.0pt; width:71.9pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt; height:19.7pt" width="96"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">1 giây</span></span></span></span></td>
		</tr>
		<tr style="height:19.7pt">
			<td style="border:solid windowtext 1.0pt; width:144.9pt; border-top:none; padding:0cm 5.4pt 0cm 5.4pt; height:19.7pt" width="193"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">ĐỔI CHỖ CHỮ SỐ</span></span></span></span></td>
			<td style="border-bottom:solid windowtext 1.0pt; width:86.3pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt; height:19.7pt" width="115"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">CHUSO.*</span></span></span></span></td>
			<td style="border-bottom:solid windowtext 1.0pt; width:87.45pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt; height:19.7pt" width="117"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">CHUSO T.Inp</span></span></span></span></td>
			<td style="border-bottom:solid windowtext 1.0pt; width:82.4pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt; height:19.7pt" width="110"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">CHUSO.Out</span></span></span></span></td>
			<td style="border-bottom:solid windowtext 1.0pt; width:71.9pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt; height:19.7pt" width="96"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">1 giây</span></span></span></span></td>
		</tr>
	</tbody>
</table>
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">Phần mở rộng .* được thay thế bằng Pas, Cpp, Py ứng với các ngôn ngữ lập trình Pascal, C++, Python.</span></span></span><br  />
<br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><b><span style="font-family:&#039;Times New Roman&#039;,serif">Hãy lập trình giải các bài toán sau:</span></b></span></span><br  />
<br  />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><b><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">CÂU 1 </span></span></b><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">(5 điểm)<b>: GIAI THỪA</b></span></span></span></span></span><br  />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Cho trước số nguyên dương n (n&lt;10<sup>9</sup>). Hãy cho biết trong kết quả n! (n giai thừa) có bao nhiêu chữ số 0 tận cùng?</span></span></span></span></span>

<ul>
	<li style="text-align:justify"><span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Dữ liệu vào: File văn bản giaithua.inp chỉ bao gồm một số nguyên dương n</span></span></span></span></span></li>
	<li style="text-align:justify"><span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Dữ liệu ra: Được ghi ra file văn bản giaithua.out chỉ bao gồm một số là kết quả tìm được</span></span></span></span></span></li>
</ul>
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Ví dụ:</span></span></span></span></span><br  />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span></span>

<table class="Table" style="margin-left:55px; border-collapse:collapse; border:solid windowtext 1.0pt">
	<tbody>
		<tr>
			<td style="border:solid windowtext 1.0pt; width:112.65pt; padding:0cm 5.4pt 0cm 5.4pt" valign="top" width="150"><span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Giaithua.inp</span></span></span></span></span></td>
			<td style="border:none; width:31.35pt; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt" valign="top" width="42">&nbsp;</td>
			<td style="border:solid windowtext 1.0pt; width:81.0pt; border-left:none; padding:0cm 5.4pt 0cm 5.4pt" valign="top" width="108"><span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Giaithua.out</span></span></span></span></span></td>
		</tr>
		<tr>
			<td style="border:solid windowtext 1.0pt; width:112.65pt; border-top:none; padding:0cm 5.4pt 0cm 5.4pt" valign="top" width="150"><span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">16780</span></span></span></span></span></td>
			<td style="border:none; width:31.35pt; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt" valign="top" width="42">&nbsp;</td>
			<td style="border-bottom:solid windowtext 1.0pt; width:81.0pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt" valign="top" width="108"><span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">4193</span></span></span></span></span></td>
		</tr>
	</tbody>
</table>
<br  />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><b><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">CÂU 2 </span></span></b><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">(5 điểm)<b>: FIBONACI</b></span></span></span></span></span><br  />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Dãy Fibonacci là dãy số thỏa&nbsp; mãn: F&#91;1&#93; = 1; F&#91;2&#93; = 1; F&#91;i&#93; = F&#91;i-1&#93;+F&#91;i-2&#93; với&nbsp; mọi số tự nhiên&nbsp; i &gt; 2.</span></span></span></span></span><br  />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Cho trước số nguyên dương n (n&lt;10<sup>9</sup>). Hãy phân tích n thành tổng ít nhất các số fibonacci không trùng nhau?</span></span></span></span></span>

<ul>
	<li style="text-align:justify"><span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Dữ liệu vào: File văn bản fibo.inp chỉ bao gồm một số nguyên dương n</span></span></span></span></span></li>
	<li style="text-align:justify"><span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Dữ liệu ra: Được ghi ra file văn bản fibo.out là dãy fibonacci được sắp theo thứ tự giảm thoả mãn yêu cầu đề bài</span></span></span></span></span></li>
</ul>
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Ví dụ:</span></span></span></span></span><br  />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span></span>

<table class="Table" style="margin-left:55px; border-collapse:collapse; border:solid windowtext 1.0pt">
	<tbody>
		<tr>
			<td style="border:solid windowtext 1.0pt; width:112.65pt; padding:0cm 5.4pt 0cm 5.4pt" valign="top" width="150"><span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Fibo.inp</span></span></span></span></span></td>
			<td style="border:none; width:31.35pt; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt" valign="top" width="42">&nbsp;</td>
			<td style="border:solid windowtext 1.0pt; width:117.0pt; border-left:none; padding:0cm 5.4pt 0cm 5.4pt" valign="top" width="156"><span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Fibo.out</span></span></span></span></span></td>
		</tr>
		<tr>
			<td style="border:solid windowtext 1.0pt; width:112.65pt; border-top:none; padding:0cm 5.4pt 0cm 5.4pt" valign="top" width="150"><span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">1750</span></span></span></span></span></td>
			<td style="border:none; width:31.35pt; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt" valign="top" width="42">&nbsp;</td>
			<td style="border-bottom:solid windowtext 1.0pt; width:117.0pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt" valign="top" width="156"><span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">1597 144 8 1</span></span></span></span></span></td>
		</tr>
	</tbody>
</table>
<span style="font-size:12pt"><span style="line-height:150%"><span style="font-family:VNI-Times"><b><span style="font-size:14.0pt"><span style="line-height:150%"><span style="font-family:&#039;Times New Roman&#039;,serif">CÂU 3 </span></span></span></b><span style="font-size:14.0pt"><span style="line-height:150%"><span style="font-family:&#039;Times New Roman&#039;,serif">(6 điểm):<b> XẾP TÁO</b></span></span></span></span></span></span><br  />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Siêu thị Mường Thanh Diễn Châu đang bày bán rất nhiều loại hoa quả, trong đó có <i>n</i> quả cam và <i>n</i> quả táo được xếp thành một dãy rất dài. Trong quá trình xếp, các nhân viên đã vô ý xếp những quả cam và những quả táo không theo một thứ tự nhất định. Quản lý siêu thị yêu cầu các nhân viên phải xếp lại sao cho chúng được xếp xen kẽ nhau, cứ một quả cam rồi lại đến một quả táo và ngược lại.</span></span></span></span></span><br  />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Các hành động lấy một quả cam hoặc quả táo ra khỏi dãy, dồn những quả bên trái hoặc bên phải về chỗ trống vừa lấy và chèn quả vừa lấy vào vị trí thích hợp được xem là một thao tác.</span></span></span></span></span><br  />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><b><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Yêu cầu</span></span></b><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">: Bạn hãy giúp người quản lý siêu thị tính xem cần ít nhất bao nhiêu thao tác để xếp lại dãy quả cam và quả táo.</span></span></span></span></span><br  />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><b><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Dữ liệu vào</span></span></b><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">: Từ tệp văn bản XEPTAO.INP gồm:</span></span></span></span></span>

<ul>
	<li style="margin-top:4px; margin-bottom:4px; text-align:justify"><span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Dòng đầu ghi số nguyên dương <i>n</i> (<i>n</i> ≤ 10<sup>6</sup>).</span></span></span></span></span></li>
	<li style="margin-top:4px; margin-bottom:4px; text-align:justify"><span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Dòng thứ hai ghi 2.<i>n</i>số 0 và 1, trong đó những số 0 biểu thị cho vị trí các quả cam còn những số 1 biểu thị cho vị trí các quả táo.</span></span></span></span></span></li>
</ul>
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><b><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Kết quả</span></span></b><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">: Ghi ra tệp văn bản XEPTAO.OUT một số nguyên duy nhất là số thao tác ít nhất cần thực hiện để xếp lại dãy quả cam và quả táo theo đúng yêu cầu bài toán.</span></span></span></span></span><br  />
<span style="font-size:12pt"><span style="line-height:150%"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="line-height:150%"><span style="font-family:&#039;Times New Roman&#039;,serif">Ví dụ:</span></span></span></span></span></span>

<table align="center" class="Table" style="border-collapse:collapse; border:solid windowtext 1.0pt">
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			<td style="border:solid windowtext 1.0pt; width:151.2pt; padding:0cm 5.4pt 0cm 5.4pt" valign="top" width="202"><span style="font-size:12pt"><span style="font-family:VNI-Times"><b><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">XEPTAO.INP</span></span></b></span></span></td>
			<td style="border:solid windowtext 1.0pt; width:151.2pt; border-left:none; padding:0cm 5.4pt 0cm 5.4pt" valign="top" width="202"><span style="font-size:12pt"><span style="font-family:VNI-Times"><b><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">XEPTAO.OUT</span></span></b></span></span></td>
		</tr>
		<tr>
			<td style="border:solid windowtext 1.0pt; width:151.2pt; border-top:none; padding:0cm 5.4pt 0cm 5.4pt" valign="top" width="202"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">3</span></span></span></span><br  />
			<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">100011</span></span></span></span></td>
			<td style="border-bottom:solid windowtext 1.0pt; width:151.2pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt" valign="top" width="202"><span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">2</span></span></span></span></td>
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</table>
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<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><b><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">CÂU 4 </span></span></b><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">(4 điểm)<b>: ĐỔI CHỖ CHỮ SỐ</b></span></span></span></span></span><br  />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Cho hai số nguyên dương K và S. Nhiệm vụ của các em đưa ra số lớn nhất bằng cách thực hiện nhiều nhất K lần đổi chỗ chữ số của số S.</span></span></span></span></span><br  />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span lang="FR" style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Ví dụ k=3 và s=1234567 ta đươc 7654321</span></span></span></span></span><br  />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><b><span lang="FR" style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Dữ liệu vào</span></span></b><span lang="FR" style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">: Từ tệp văn bản CHUSO.INP gồm:</span></span></span></span></span>

<ul>
	<li style="margin-top:4px; margin-bottom:4px; text-align:justify"><span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span lang="FR" style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Dòng đầu ghi số nguyên dương K (0&lt;k&lt;=10).</span></span></span></span></span></li>
</ul>
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">- Dòng thứ 2 ghi số dương S</span></span></span></span></span><br  />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:VNI-Times"><b><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Kết quả</span></span></b><span style="font-size:14.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">: Ghi ra tệp văn bản CHUSO.OUT một số nguyên duy nhất là ra số lớn nhất bằng cách thực hiện nhiều nhất K lần đổi chỗ chữ số của số S.</span></span></span></span></span><br  />
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<span style="font-size:12pt"><span style="tab-stops:60.1pt"><span style="font-family:VNI-Times"><span style="font-size:12.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif">---------------------------<b>HẾT</b>---------------------------</span></span></span></span></span><br  />
<span style="font-size:12pt"><span style="tab-stops:60.1pt"><span style="font-family:VNI-Times"><b><span style="font-size:12.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif">(Lưu ý: đề thi có 2 trang)</span></span></b></span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><b><u><span lang="FR" style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">CODE</span></span></u></b></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span lang="FR" style="font-family:&#039;Times New Roman&#039;,serif">CÂU 1</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">program giaithua;</span></span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">var n,tong:longint;</span></span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">begin</span></span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; assign(input,&#039;Giaithua.inp&#039;); reset(input);</span></span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; assign(output,&#039;Giaithua.out&#039;); rewrite(output);</span></span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; read(n);</span></span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; tong:=0;</span></span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; while n&gt;0 do</span></span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; begin</span></span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; tong:= tong + (n div 5);</span></span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; n:= n div 5;</span></span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; end;</span></span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; write(tong);</span></span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; close(input);</span></span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; close(output);</span></span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-size:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">end.</span></span></span></span><br  />
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<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">CÂU 2</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">rogram fibo1;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">var n,i:longint;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">function timfibo(n:longint):longint;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">var i,j,t:longint;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">begin</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;if n&lt; 4 then exit(n);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; i:=1; j:=2;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; while i+j&lt;n do</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; begin</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; t:= j;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; j:= i+j;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; i:= t;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; end;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; exit(j);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">end;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">begin</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; assign(input,&#039;Fibo.inp&#039;); reset(input);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; assign(output,&#039;Fibo.out&#039;); rewrite(output);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; read(n);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; while n&gt;0 do</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; begin</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; i:=timfibo(n);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; write(i,&#039; &#039;);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; n:=n-i;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; end;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; close(input);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; close(output);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">end.</span></span></span><br  />
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<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">CÂU 3</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">var f1,f2:text;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; a:array&#91;1..2000001&#93; of char;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; n,i,d0,d1:longint;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">begin</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; assign(f1,&#039;xeptao.inp&#039;);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; reset(f1);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; readln(f1,n);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; n:=n*2;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; for i:=1 to n do read(f1,a&#91;i&#93;);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; close(f1);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; d1:=0;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; d0:=0;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; for i:=1 to n-1 do</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; if (a&#91;i&#93;=&#039;0&#039;)and(a&#91;i+1&#93;=&#039;0&#039;) then d0:=d0+1</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; else if (a&#91;i&#93;=&#039;1&#039;)and(a&#91;i+1&#93;=&#039;1&#039;) then d1:=d1+1;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; assign(f2,&#039;xeptao.out&#039;);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; rewrite(f2);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; if d1&gt;d0 then writeln(f2,d1) else writeln(f2,d0);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; close(f2);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">end.</span></span></span><br  />
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<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">CÂU 4</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">#include&lt;bits/stdc++.h&gt;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">using namespace std;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">int k,i,j;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">string s;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">int main()</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">{</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; freopen(&quot;doichuso.inp&quot;,&quot;r&quot;,stdin);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; freopen(&quot;doichuso.out&quot;,&quot;w&quot;,stdout);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; cin&gt;&gt;k&gt;&gt;s;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; for(i=0;i&lt;s.size(); i++)</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; {</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; char Max=s&#91;s.size()-1&#93;;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; int vt=s.size()-1;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; for(j=s.size()-1;j&gt;i&amp;&amp;k&gt;0;j--)</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if(Max&lt;s&#91;j&#93;)</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Max=s&#91;j&#93;;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; vt=j;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if(Max&gt;s&#91;i&#93;)</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; swap(s&#91;i&#93;,s&#91;vt&#93;);</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; k++;</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; }</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; cout&lt;&lt;s;</span></span></span><br  />
<br  />
<span style="font-size:12pt"><span style="font-family:VNI-Times"><span style="font-family:&#039;Times New Roman&#039;,serif">}</span></span></span><br  />
&nbsp;
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