Solution:https://codeforces.com/blog/entry/74224 #include <bits/stdc++.h># define LLlonglongusingnamespacestd;strings;intmain(){intT; scanf("%d", &T);while(T--){intn,d; scanf("%d %d", &n, &d);inthi=n*(n-1)/2;intlo=0;inth=0;for(inti=2;i<=n;++i){if((i&(i-1))=...
Constructatree[CodeForces - 1098C] 能否构造出一棵 nnn 个节点的树,使得以每个点为根的子树的大小加起来等于sss,如果能,输出使得儿子最多的点的儿子数目最少的那种。Solution\mathcal{Solution}Solution边界:菊花是子树和最小的构造方法,链是子树和最大的构造方法,也就是说下界为2n−12n-12n−1上界为n(n+...