Problem Codeforces #541 (Div2) - F. Asya And Kittens Time Limit: 2000 mSec Problem Description Input The first line contains a single integer nn (2≤n≤150000) — the number of kittens. Each of the following n−1lines contains integers xi and yi (1≤xi,…
题意:给定 3 种操作, 第一种 1 u v 把 u 和 v 合并 第二种 2 l r 把 l - r 这一段区间合并 第三种 3 u v 判断 u 和 v 是不是在同一集合中. 析:很容易知道是用并查集来做,但是如果单纯的用并查集,肯定是要超时的,所以要用链表,如果合并了,就把链表指向, 这样就搞定了这个题. 代码如下: #pragma comment(linker, "/STACK:1024000000,1024000000") #include <cstdio> #i…
Codeforces Round #268 (Div. 2)D Codeforces Round #268 (Div. 1)B CF468B D. Two Sets time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Little X has n distinct integers: p1, p2, ..., pn. He want…
CF456E Codeforces Round #260 (Div. 1) C Codeforces Round #260 (Div. 2) E http://codeforces.com/contest/455/problem/C C. Civilization time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Andrew p…
C. Not Equal on a Segment 题目连接: http://www.codeforces.com/contest/622/problem/C Description You are given array a with n integers and m queries. The i-th query is given with three integers li, ri, xi. For the i-th query find any position pi (li ≤ pi …
C. Civilization Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/455/problem/C Description Andrew plays a game called "Civilization". Dima helps him. The game has n cities and m bidirectional roads. The cities are numbe…