codeforces 420D Cup Trick 题意 题解 官方做法需要用到线段树+平衡树(? 如果数据小的话似乎可以用莫队).然后代码好长好长.我补了一个只要用到树状数组的做法. 代码 #include<bits/stdc++.h> using namespace std; #define fi first #define se second #define mp make_pair #define pb push_back #define rep(i, a, b) for(int i=…
Cup Trick 平衡树维护一下位置. #include<bits/stdc++.h> #include <bits/extc++.h> #define LL long long #define fi first #define se second #define mk make_pair #define PLL pair<LL, LL> #define PLI pair<LL, int> #define PII pair<int, int>…
题目链接:http://codeforces.com/contest/522/problem/D 题目大意: 给你一个长度为n的序列,然后有m次查询,每次查询输入一个区间[li,lj],对于每一个查询,输出在这个区间内的两个相等的数的最短距离,如果没有相等的则输出-1. 线段树+扫描线,线段树维护的值是区间的最小值,从后往前扫,然后每次要做的事有两个: 1.判断当前这个位置 i 的数刚刚是不是出现过,假设刚刚出现的位置是 l ,如果出现过,则在线段树中把l这个位置的值更新为 l - i,同时更…
H. Bots Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/575/problem/H Description Sasha and Ira are two best friends. But they aren’t just friends, they are software engineers and experts in artificial intelligence. They are…
D. Tablecity Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/575/problem/D Description There was a big bank robbery in Tablecity. In order to catch the thief, the President called none other than Albert – Tablecity’s Chief o…
F. Bulbo Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/575/problem/F Description Bananistan is a beautiful banana republic. Beautiful women in beautiful dresses. Beautiful statues of beautiful warlords. Beautiful stars in…
B. Photo to Remember Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/522/problem/B Description One day n friends met at a party, they hadn't seen each other for a long time and so they decided to make a group photo together…
