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<p class="MsoNormal" style="text-indent:21.0pt;"> <span style="font-family:宋体;">端午节<span style="color:#333333;">当天正午十二点时,因为是阳刚正气汇集之极,所以习俗上相信平日不易竖立的鸡蛋在此时能够直竖在地上。</span></span><span style="font-family:Arial,color:#333333;…
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<p class="MsoNormal" style="text-indent:21.0pt;"> <span style="font-family:宋体;">现在有一些字符串,它们需要按照以下的规则发生变化:</span><span></span> <br /> <p class="MsoNormal" style="text-indent:21.0pt;"> <span>1</span><span …
<div class="ui bottom attached segment font-content"> <div> 给定一个完全二分图,图的左右两边的顶点数目相同。我们要把图中的每条边染成红色、蓝色、或者绿色,并使得任意两条红边不共享端点、同时任意两条蓝边也不共享端点。计算所有满足条件的染色的方案数,并对10^9+7取模。 <br /> </div> </div> <div class="row"> <div class="colum…
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