tent"><div style="position: relative; overflow: hidden;"><div style="text-indent: 21pt; line-height: 120%"><span style="font-size: medium">给定n个字符串，询问每个字符串有多少子串（不包括空串）是所有n个字符串中至少k个字符串的子串？</span></div></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;"><d