HDOJ(HDU).2266 How Many Equations Can You Find (DFS) [从零开始DFS(9)] 点我挑战题目 从零开始DFS HDOJ.1342 Lotto [从零开始DFS(0)] - DFS思想与框架/双重DFS HDOJ.1010 Tempter of the Bone [从零开始DFS(1)] -DFS四向搜索/奇偶剪枝 HDOJ(HDU).1015 Safecracker [从零开始DFS(2)] -DFS四向搜索变种 HDOJ(HDU).1016…

How Many Equations Can You Find Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Description Now give you an string which only contains 0, 1 ,2 ,3 ,4 ,5 ,6 ,7 ,8 ,9.You are asked to add the sign ‘+’ or ’-’ between the char…

http://acm.hdu.edu.cn/showproblem.php?pid=2266 给一个字符串和一个数n,在字符串中间可以插入+或者 -,问有多少种等于n的情况. 要注意任意两个数之间都可以插入也可以不插入,注意枚举完所有情况. #include <cstdio> #include <cstring> ]; int n,l,cnt; void dfs(int k,int sum) { if(k==l) { if(sum==n) cnt++; return; } ; fo…

题目 这是传说中的深搜吗....不确定,,,,貌似更加像是模拟,,,, //我要做深搜题目拉 //实际上还是模拟 #include<iostream> #include<string> #include<stdio.h> #include<string.h> #include<math.h> #include<algorithm> using namespace std; int ans; ]; __int64 n; ]; int l…

How Many Equations Can You Find Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 985    Accepted Submission(s): 659 Problem Description Now give you an string which only contains 0, 1 ,2 ,3 ,4 ,5…

简单DFS. #include <cstdio> #include <cstring> #define MAXN 15 char str[MAXN]; __int64 x; int n; void dfs(int s, __int64 v) { int i; __int64 tmp = ; if (str[s] == '\0') { if (v == x) ++n; return ; } for (i=s; str[i]; ++i) { tmp = *tmp + str[i] -…

题意:在数字之间添加运算符号,使得结果等于题目中要求的Sample Input123456789 321 1Sample Output181 这题虽然看起来比较简单,但是之前和差的状态不太好表示,因此就枚举断点,求每个断点之间的数是加数还是减数即可,剪枝依然是+位置状态 #include<cstdio> #include<iostream> #include<algorithm> #include<cstring> #include<cmath>…

CRB and Tree Time Limit: 8000/4000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 2112    Accepted Submission(s): 635 Problem Description CRB has a tree, whose vertices are labeled by 1, 2, …, N. They are connected…

哈密顿绕行世界问题 Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 3105    Accepted Submission(s): 1918 Problem Description 一个规则的实心十二面体,它的 20个顶点标出世界著名的20个城市,你从一个城市出发经过每个城市刚好一次后回到出发的城市.    Input 前20行的第i行…

How Many Equations Can You Find Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 714    Accepted Submission(s): 467 Problem Description Now give you an string which only contains 0, 1 ,2 ,3 ,4 ,5…