bottom attached segment font-content"><div style="position: relative; overflow: hidden;"><div>给定N个同心的扇形，求有多少面积，被至少K个扇形所覆盖。</div>
<p></p></div></div></div></div><div class="row"><div class="column"><h4 class="ui top attached block header">输入格式</h4><div class="ui bottom attached segment font-content"><div style="position: relative; overflow: hidden;"><div class=content><div>第一行是三个整数n，m，k。n代表同心扇形的个数，m用来�