题目链接:http://codeforces.com/contest/620/problem/E E. New Year Tree time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output The New Year holidays are over, but Resha doesn't want to throw away the N…

#include<bits/stdc++.h>using namespace std;int st[1000007];int top;int s[1000007],t[1000007];int mx[4000007];int sum[4000007];int head[1000007],to[2000007],nex[2000007];int n,k;int a[10000077];int dfn;int tot;void pushup(int rt){    mx[rt]=max(mx[rt…

题意 给定序列$a_n$,每次将$[L,R]$区间内的数$a_i$替换为$d(a_i)$,或者询问区间和 这题和区间开方有相同的操作 对于$a_i \in (1,10^6)$,$10$次$d(a_i)$以内肯定可以最终化为$1$或者$2$,所以线段树记录区间最大值和区间和,$Max\le2$就返回,单点暴力更新,最后线性筛预处理出$d$ 时间复杂度$O(m\log n)$ 代码 #include <bits/stdc++.h> using namespace std; typedef long…

E. New Year Tree time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output The New Year holidays are over, but Resha doesn't want to throw away the New Year tree. He invited his best friends Kerim a…

题目链接:http://codeforces.com/contest/799/problem/C 题目: 题意: 给你n种喷泉的价格和漂亮值,这n种喷泉题目指定用钻石或现金支付(分别用D和C表示),C和D之间不能相互转换.你现在需要修建两个喷泉,给你硬币数和现金数,问你怎样才能使修建的两个喷泉的总漂亮值最大. 思路: 易知,要修建的两个喷泉如果一个是用钻石支付,另一个用现金支付,那么只需找到小于给的钻石和现金的上限的漂亮值最大的两个温泉相加,此处遍历一边即可.对于这两个温泉都用同一种支付方式的情…

链接: https://codeforces.com/contest/1263/problem/E 题意: The development of a text editor is a hard problem. You need to implement an extra module for brackets coloring in text. Your editor consists of a line with infinite length and cursor, which point…

B. Prison Transfer Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/problemset/problem/427/B Description The prison of your city has n prisoners. As the prison can't accommodate all of them, the city mayor has decided to transfer c…

F. Cookies 链接:http://codeforces.com/contest/1099/problem/F 题意: 给你一棵树,树上有n个节点,每个节点上有ai块饼干,在这个节点上的每块饼干需要花费bi时间,有两个玩家,玩家一可以移动到当前点的子节点也可以申请游戏结束返回根节点并吃沿途的饼干,玩家二可以删除当前点到儿子节点的一条边,走路和吃饼干都消耗时间,会给出一个总时间,在总时间内尽可能的多吃饼干,问最多能吃多少个? 思路: 由于是玩家一先手,那么最开始的最大边则不会被删除,但之后路…

E. Minimum spanning tree for each edge 题目连接: http://www.codeforces.com/contest/609/problem/E Description Connected undirected weighted graph without self-loops and multiple edges is given. Graph contains n vertices and m edges. For each edge (u, v) f…

E. Minimum spanning tree for each edge 题目连接: http://www.codeforces.com/contest/609/problem/E Description Connected undirected weighted graph without self-loops and multiple edges is given. Graph contains n vertices and m edges. For each edge (u, v) f…