原题代号:HDU 4277 原题链接:http://acm.hdu.edu.cn/showproblem.php?pid=4277 原题描述: USACO ORZ Time Limit: 5000/1500 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 5208    Accepted Submission(s): 1725 Problem Description Like ev…

hashmap判重大法好 #include<cstdio> #include<iostream> #include<algorithm> #include<cstring> #include<cmath> #include<queue> #include<map> using namespace std; #define MOD 1000000007 const int INF=0x3f3f3f3f; ; typedef…

没什么好方法,只能用dfs了. 代码如下: #include<iostream> #include<cstring> #include<cstdio> #include<algorithm> #include<cmath> #include<set> #define I(x) scanf("%d",&x) using namespace std; ],n,ans; set<pair<int,in…

Problem Description Like everyone, cows enjoy variety. Their current fancy is new shapes for pastures. The old rectangular shapes are out of favor; new geometries are the favorite.I. M. Hei, the lead cow pasture architect, is in charge of creating a…

题目链接 #include <cstdio> //by-ACMer_xiaohao #include <cstring> #include <map> using namespace std; #define N 50005 //不知道数组为什么开这么大 map<int,bool> mp[N]; int sum,n,ma[20],ans; void dfs(int a,int b,int y) { int c=sum-a-b; if(a>sum/3||…

题目大意:有N个木棒,相互组合拼接,能组成多少种不同的三角形. 思路:假设c>=b>=a 然后枚举C,在C的dfs里嵌套枚举B的DFS. #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> #include <vector> #define mod 2000007 using namespace std; int n; int X[…

USACO ORZ Time Limit: 5000/1500 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Problem Description Like everyone, cows enjoy variety. Their current fancy is new shapes for pastures. The old rectangular shapes are out of favor; new geom…

USACO ORZ Time Limit: 5000/1500 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3581    Accepted Submission(s): 1196 Problem Description Like everyone, cows enjoy variety. Their current fancy is new shapes for pastur…

题意: 给你n个数,要你用光所有数字组成一个三角形,问能组成多少种不同的三角形 时间分析: 3^15左右 #include<stdio.h> #include<set> using namespace std; set<long long>s; int _case,n,sum; ]; int Dfs(int a,int b,int c,int m) { if(m==n) { if(a>b||b>c) ; if(a&&b&&c&…

USACO ORZ Time Limit: 5000/1500 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 3809    Accepted Submission(s): 1264 Problem Description Like everyone, cows enjoy variety. Their current fancy is new shapes for pastu…