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<h2>Source code for submission s818</h2>

<div class="tabber"><div class="tabbertab"><h2 class="filename"><a name="source0"></a>main.cpp</h2> 

<pre class="cpp" style="font-family:monospace;"><ol><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;"><span style="color: #666666;">//BUGS</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;"><span style="color: #339900;">#include &lt;iostream&gt;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;"><span style="color: #339900;">#include &lt;stdio.h&gt;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;"><span style="color: #339900;">#include &lt;cmath&gt;</span></div></li><li style="font-weight: bold; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;"><span style="color: #339900;">#include &lt;stack&gt;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp;</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;"><span style="color: #0000ff;">using</span> <span style="color: #0000ff;">namespace</span> std<span style="color: #008080;">;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp;</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;"><span style="color: #0000ff;">int</span> main<span style="color: #008000;">&#40;</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">&#123;</span></div></li><li style="font-weight: bold; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp;</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp;</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">	<span style="color: #0000ff;">char</span> arr<span style="color: #008000;">&#91;</span><span style="color: #0000dd;">1000</span><span style="color: #008000;">&#93;</span><span style="color: #008080;">;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp;</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">	<span style="color: #0000ff;">int</span> n<span style="color: #008080;">;</span></div></li><li style="font-weight: bold; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp;</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">	<span style="color: #0000ff;">int</span> c<span style="color: #008080;">;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp;</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">	<span style="color: #0000ff;">while</span><span style="color: #008000;">&#40;</span><span style="color: #0000dd;">cin</span> <span style="color: #000080;">&gt;&gt;</span> n<span style="color: #008000;">&#41;</span><span style="color: #008000;">&#123;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp;</div></li><li style="font-weight: bold; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">		<span style="color: #0000ff;">int</span> len <span style="color: #000080;">=</span> <span style="color: #0000dd;">0</span><span style="color: #008080;">;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">		<span style="color: #0000dd;">cin</span>.<span style="color: #007788;">ignore</span><span style="color: #008000;">&#40;</span><span style="color: #0000dd;">1</span><span style="color: #008000;">&#41;</span><span style="color: #008080;">;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">		<span style="color: #0000ff;">while</span><span style="color: #008000;">&#40;</span><span style="color: #008000;">&#40;</span>c<span style="color: #000080;">=</span><span style="color: #0000dd;">getchar</span><span style="color: #008000;">&#40;</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">&#41;</span> <span style="color: #000040;">&amp;&amp;</span> c<span style="color: #000040;">!</span><span style="color: #000080;">=</span><span style="color: #FF0000;">'<span style="color: #000099; font-weight: bold;">\n</span>'</span> <span style="color: #000040;">&amp;&amp;</span> c<span style="color: #000040;">!</span><span style="color: #000080;">=</span><span style="color: #0000ff;">EOF</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">&#123;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">			arr<span style="color: #008000;">&#91;</span>len<span style="color: #000040;">++</span><span style="color: #008000;">&#93;</span> <span style="color: #000080;">=</span> c<span style="color: #008080;">;</span>				</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">		<span style="color: #008000;">&#125;</span></div></li><li style="font-weight: bold; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">		arr<span style="color: #008000;">&#91;</span>len<span style="color: #008000;">&#93;</span> <span style="color: #000080;">=</span> <span style="color: #0000dd;">0</span><span style="color: #008080;">;</span>		</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp;</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">		<span style="color: #0000ff;">while</span><span style="color: #008000;">&#40;</span>n<span style="color: #000040;">--</span> <span style="color: #000080;">&gt;</span> <span style="color: #0000dd;">0</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">&#123;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">			stack<span style="color: #000080;">&lt;</span><span style="color: #0000ff;">int</span><span style="color: #000080;">&gt;</span> s<span style="color: #008080;">;</span>			</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">			<span style="color: #0000ff;">int</span> i <span style="color: #000080;">=</span> <span style="color: #0000dd;">0</span><span style="color: #008080;">;</span></div></li><li style="font-weight: bold; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">			<span style="color: #0000ff;">while</span><span style="color: #008000;">&#40;</span><span style="color: #008000;">&#40;</span>c<span style="color: #000080;">=</span><span style="color: #0000dd;">getchar</span><span style="color: #008000;">&#40;</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">&#41;</span> <span style="color: #000040;">&amp;&amp;</span> c<span style="color: #000040;">!</span><span style="color: #000080;">=</span><span style="color: #FF0000;">'<span style="color: #000099; font-weight: bold;">\n</span>'</span> <span style="color: #000040;">&amp;&amp;</span> c<span style="color: #000040;">!</span><span style="color: #000080;">=</span><span style="color: #0000ff;">EOF</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">&#123;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">				<span style="color: #0000ff;">if</span><span style="color: #008000;">&#40;</span>i <span style="color: #000080;">&lt;</span> len <span style="color: #000040;">&amp;&amp;</span> c<span style="color: #000080;">==</span>arr<span style="color: #008000;">&#91;</span>i<span style="color: #008000;">&#93;</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">&#123;</span>										</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">					<span style="color: #0000ff;">if</span><span style="color: #008000;">&#40;</span><span style="color: #000040;">!</span>s.<span style="color: #007788;">empty</span><span style="color: #008000;">&#40;</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">&#41;</span> s.<span style="color: #007788;">pop</span><span style="color: #008000;">&#40;</span><span style="color: #008000;">&#41;</span><span style="color: #008080;">;</span> </div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">					s.<span style="color: #007788;">push</span><span style="color: #008000;">&#40;</span>i<span style="color: #008000;">&#41;</span><span style="color: #008080;">;</span>										</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">					i<span style="color: #000040;">++</span><span style="color: #008080;">;</span>																		</div></li><li style="font-weight: bold; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">					<span style="color: #0000ff;">if</span><span style="color: #008000;">&#40;</span>i<span style="color: #000080;">==</span>len<span style="color: #008000;">&#41;</span><span style="color: #008000;">&#123;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">						s.<span style="color: #007788;">pop</span><span style="color: #008000;">&#40;</span><span style="color: #008000;">&#41;</span><span style="color: #008080;">;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">						<span style="color: #0000ff;">if</span><span style="color: #008000;">&#40;</span><span style="color: #000040;">!</span>s.<span style="color: #007788;">empty</span><span style="color: #008000;">&#40;</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">&#41;</span> i<span style="color: #000080;">=</span>s.<span style="color: #007788;">top</span><span style="color: #008000;">&#40;</span><span style="color: #008000;">&#41;</span><span style="color: #000040;">+</span><span style="color: #0000dd;">1</span><span style="color: #008080;">;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">						<span style="color: #0000ff;">else</span> i <span style="color: #000080;">=</span> <span style="color: #0000dd;">0</span><span style="color: #008080;">;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">					<span style="color: #008000;">&#125;</span></div></li><li style="font-weight: bold; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">				<span style="color: #008000;">&#125;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">				<span style="color: #0000ff;">else</span> <span style="color: #0000ff;">if</span><span style="color: #008000;">&#40;</span>c<span style="color: #000080;">==</span>arr<span style="color: #008000;">&#91;</span><span style="color: #0000dd;">0</span><span style="color: #008000;">&#93;</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">&#123;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">					i <span style="color: #000080;">=</span> <span style="color: #0000dd;">1</span><span style="color: #008080;">;</span>					</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">					s.<span style="color: #007788;">push</span><span style="color: #008000;">&#40;</span><span style="color: #0000dd;">0</span><span style="color: #008000;">&#41;</span><span style="color: #008080;">;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">				<span style="color: #008000;">&#125;</span></div></li><li style="font-weight: bold; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">				<span style="color: #0000ff;">else</span> <span style="color: #008000;">&#123;</span>					</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">					<span style="color: #0000ff;">while</span><span style="color: #008000;">&#40;</span><span style="color: #000040;">!</span>s.<span style="color: #007788;">empty</span><span style="color: #008000;">&#40;</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">&#41;</span> <span style="color: #008000;">&#123;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">						i <span style="color: #000080;">=</span> s.<span style="color: #007788;">top</span><span style="color: #008000;">&#40;</span><span style="color: #008000;">&#41;</span> <span style="color: #000040;">+</span><span style="color: #0000dd;">1</span><span style="color: #008080;">;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">						<span style="color: #0000ff;">int</span> rpos <span style="color: #000080;">=</span> <span style="color: #0000dd;">0</span><span style="color: #008080;">;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">						<span style="color: #0000ff;">while</span><span style="color: #008000;">&#40;</span>i<span style="color: #000040;">--</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">&#123;</span></div></li><li style="font-weight: bold; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">							<span style="color: #0000dd;">printf</span><span style="color: #008000;">&#40;</span><span style="color: #FF0000;">&quot;%c&quot;</span>, arr<span style="color: #008000;">&#91;</span>rpos<span style="color: #000040;">++</span><span style="color: #008000;">&#93;</span><span style="color: #008000;">&#41;</span><span style="color: #008080;">;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">						<span style="color: #008000;">&#125;</span>		</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">						s.<span style="color: #007788;">pop</span><span style="color: #008000;">&#40;</span><span style="color: #008000;">&#41;</span><span style="color: #008080;">;</span>				</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">					<span style="color: #008000;">&#125;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">					<span style="color: #0000dd;">printf</span><span style="color: #008000;">&#40;</span><span style="color: #FF0000;">&quot;%c&quot;</span>,c<span style="color: #008000;">&#41;</span><span style="color: #008080;">;</span>					</div></li><li style="font-weight: bold; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">				<span style="color: #008000;">&#125;</span>				</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">			<span style="color: #008000;">&#125;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">			<span style="color: #0000dd;">printf</span><span style="color: #008000;">&#40;</span><span style="color: #FF0000;">&quot;<span style="color: #000099; font-weight: bold;">\n</span>&quot;</span><span style="color: #008000;">&#41;</span><span style="color: #008080;">;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">		<span style="color: #008000;">&#125;</span>		</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp;</div></li><li style="font-weight: bold; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">	<span style="color: #008000;">&#125;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp;</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp;</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp;</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">	<span style="color: #0000ff;">return</span> <span style="color: #0000dd;">0</span><span style="color: #008080;">;</span></div></li><li style="font-weight: bold; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;"><span style="color: #008000;">&#125;</span></div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp;</div></li><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp;</div></li></ol></pre></div></div>
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