摘要:
"2017 多校2 hdu 6053 TrickGCD" 题目: You are given an array $A$ , and Zhu wants to know there are how many different array $B$ satisfy the following condi 阅读全文
摘要:
"2017 多校2 I Curse Myself" (第k小生成树) 题目: 给一张带权无向连通图,该图的任意一条边最多只会经过一个简单环,定义$V(k)为第k小生成树的权值和$,求出$\sum_{k=1}^{K}k \cdot V(k) mod 2^{32}$ 思路: 比赛的时候看了一眼,没有看清 阅读全文