传送门 A. Bear and Three Balls time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Limak is a little polar bear. He has n balls, the i-th ball has size ti. Limak wants to give one ball to each of…

Bear and Three Balls Time Limit:2000MS     Memory Limit:262144KB     64bit IO Format:%I64d & %I64u Submit Status Description Limak is a little polar bear. He has n balls, the i-th ball has size ti. Limak wants to give one ball to each of his three fr…

题目链接: A. Bear and Three Balls time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Limak is a little polar bear. He has n balls, the i-th ball has size ti. Limak wants to give one ball to each…

A. Bear and Three Balls time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Limak is a little polar bear. He has n balls, the i-th ball has size ti. Limak wants to give one ball to each of his…

A. Bear and Three Balls 题目连接: http://www.codeforces.com/contest/653/problem/A Description Limak is a little polar bear. He has n balls, the i-th ball has size ti. Limak wants to give one ball to each of his three friends. Giving gifts isn't easy - th…

Limak is an old brown bear. He often goes bowling with his friends. Today he feels really good and tries to beat his own record! For rolling a ball one gets a score — an integer (maybe negative) number of points. Score for the i-th roll is multiplied…

Codeforces 题目传送门 & 洛谷题目传送门 u1s1 我做这道 *2600 的动力是 wjz 出了道这个套路的题,而我连起码的思路都没有,wtcl/kk 首先考虑怎样对某个固定的串计算答案,这显然可以 \(dp\) 解决,设 \(dp_{i,j}\) 表示考虑前 \(i\) 个字符,删去之后与 \(2017\) 的 LCS 为 \(j\),最少需删除多少个字符,那么显然有转移方程: \(dp_{i,0}=\begin{cases}dp_{i-1,0}&(s[i]\neq'2')\…

Lakhesh loves to make movies, so Nephren helps her run a cinema. We may call it No. 68 Cinema. However, one day, the No. 68 Cinema runs out of changes (they don't have 50-yuan notes currently), but Nephren still wants to start their business. (Assume…

https://codeforces.com/contest/1304/problem/F2 #include<bits/stdc++.h> using namespace std; ; ][maxn]; ][maxn]; ][maxn]; int n,m,k; struct node{ int l,r; int Max,lz; }seg_t[maxn*]; void build(int l,int r,int p){ seg_t[p].l = l,seg_t[p].r = r; if(l =…

E. Bear and Forgotten Tree 2 题目连接: http://www.codeforces.com/contest/653/problem/E Description A tree is a connected undirected graph consisting of n vertices and n  -  1 edges. Vertices are numbered 1 through n. Limak is a little polar bear. He once…