Problem A Arrays 思路:水一水. #include<bits/stdc++.h> using namespace std; ; int n1,n2,k,m,a[N],b[N]; int main() { scanf("%d%d",&n1,&n2); scanf("%d%d",&k,&m); ;i<=n1;i++) scanf("%d",&a[i]); ;i<=n2;i…

D. Minimization time limit per test  2 seconds memory limit per test  256 megabytes input  standard input  output  standard output You've got array A, consisting of n integers and a positive integer k. Array A is indexed by integers from 1 to n. You…

一个合法的三角形的充要条件是a<b+c,其中a为最长的一边,可以考虑找出所有不满足的情况然后用总方案减去不合法的情况. 对于一个给定的总长度tl(一定要分完,因为是枚举tl,不分配的长度已经考虑过了),分成三份,因为可以有两份为零,采用插空法的时候 增加两个假想长度为零的单位,所以方案数是C(tl+2,2), 假设a是增加长度以后最长的一边,r是tl减去给a增加长度之后剩下的长度, 那么不满足的情况的条件就可以写成a+tl-r>=b+c+r,很容易转化为r<=(a-b-c+tl)/2,显…

Codeforces Round #366 (Div. 2) A I hate that I love that I hate it水题 #I hate that I love that I hate it n = int(raw_input()) s = "" a = ["I hate that ","I love that ", "I hate it","I love it"] for i in ran…

Codeforces Round #354 (Div. 2) Problems     # Name     A Nicholas and Permutation standard input/output 1 s, 256 MB    x3384 B Pyramid of Glasses standard input/output 1 s, 256 MB    x1462 C Vasya and String standard input/output 1 s, 256 MB    x1393…

直达–>Codeforces Round #368 (Div. 2) A Brain’s Photos 给你一个NxM的矩阵,一个字母代表一种颜色,如果有”C”,”M”,”Y”三种中任意一种就输出”#Color”,如果只有”G”,”B”,”W”就输出”#Black&White”. #include <cstdio> #include <cstring> using namespace std; const int maxn = 200; const int INF =…

 cf之路,1,Codeforces Round #345 (Div. 2) ps:昨天第一次参加cf比赛,比赛之前为了熟悉下cf比赛题目的难度.所以做了round#345连试试水的深浅.....       其实这个应该是昨天就写完的,不过没时间了,就留到了今天.. 地址:http://codeforces.com/contest/651/problem/A A. Joysticks time limit per test 1 second memory limit per test 256…

Codeforces Round #279 (Div. 2) 做得我都变绿了! Problems     # Name     A Team Olympiad standard input/output 1 s, 256 MB  x2377 B Queue standard input/output 2 s, 256 MB  x1250 C Hacking Cypher standard input/output 1 s, 256 MB  x740 D Chocolate standard in…

Codeforces Round #262 (Div. 2) 1003 C. Present time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Little beaver is a beginner programmer, so informatics is his favorite subject. Soon his info…

Codeforces Round #262 (Div. 2) 1004 D. Little Victor and Set time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Little Victor adores the sets theory. Let us remind you that a set is a group of…