s is a string consisting of n character. If the area in the charge of the i-th student isn't infinite, the i-th character is &quot;0&quot;, else it's &quot;1&quot;.</div>
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<p></p></div></div></div></div></div><div class="row"><div class="column"><h4 class="ui top attached block header">样例</h4><div class="ui bottom attached segment font-content"><div style="position: relative; overflow: hidden;"><h4>样例输入</h4><div class="ui existing segment"><pre style="margin-top:0; margin-bottom:0;"><cod