Codeforces - Sum in the tree 题目链接:Codeforces - Sum in the tree 显然每个点尽量放在深度小的地方,这样一定是最优的,但是要保证答案是正确的,所以放的值不超过儿子的最小值。 AC代码:...Codeforces Round #530 (Div. 2) RANK :2252 题数 :3 补题: D - Sum in the tree 思路:贪心 把权值...
Input The first line contains one integernn — the number of vertices in the tree (2≤n≤1052≤n≤105). The following line contains integersp2p2,p3p3, ...pnpn, wherepipi stands for the parent of vertex with indexii in the tree (1≤pi<i1≤pi...
Codeforces Round #530 Sum in the tree[贪心] /* 对于每一个u和他的儿子v 必定存在 $s[u]\leq min{s[v]}$ ,否则不合法(因为a_i\geq 0) 这样u和他所有儿子的点权和是 $$ s\left[ u \right] +\sum_{v\in son\left( u \right)}{s\left[ v \right] -s\left[ u \right]} \\ =\...
You are given an undirected weighed tree with N node . You need to find maximum absolute path sum in the tree with atmost k inversions. In one inversion you can change the weight of an edge from negative to positive and vice versa.Compare Revisions History Revisions Rev.Lang.ByWhenΔComm...
Question asked in Google online coding challenge on 22nd AUG, 2020. Please help me with this question. You are given a tree with N nodes numbered 1 to N. Each node is having weight Ai. (1 <= i <= N) Find the maximum path sum between any two node u and v of the tree. Return...
D. Sum in the tree(树形+贪心),题目链接;http://codeforces.com/contest/1099/problem/D题目大意:给出一棵树,每个节点到根节点的路径上经过的所有点的权值之和,其深度为偶数的节点的信息全部擦除了,也就是用-1表示,让你求最终所有点权之和(要求最小)具体思路:对
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You are given a permutationp. Calculate the total number of inversions in all permutations that lexicographically do not exceed the given one. As this number can be very large, print it modulo1000000007(109 + 7). The first line contains a single integern(1 ≤ n ≤ 106) —...
1878C-VasilijeInCacak.cpp 1879A-Rigged.cpp 1879B-ChipsOnTheBoard.cpp 1881A-DontTryToCount.cpp 1881B-ThreeThreads.cpp 1881D-DivideAndEqualize.cpp 1882A-IncreasingSequence.cpp 1882B-SetsAndUnion.cpp 1883A-Morning.cpp 1883B-Chemistry.cpp 1883C-Raspberries.cpp 1884A-SimpleDesign.cpp 1884B-Haunted...
【Codeforces】 489C Given Length and Sum of Digits,#include#include#include#include#include#include#include#include#include#inclaxm200005#defineeps1e-10#defin