hdu4403- A very hard Aoshu problem(搜索)
枚举等号的位置,然后暴力搜索一波 这个题本身不难,但它是我第一次使用对拍程序来查找错误,值得纪念。
#include<cstdio>
#include<string.h>
#include<map>
#include<algorithm>
#define inf 0x3f3f3f3f
const int maxn=;
using namespace std;
typedef pair<int,int> P;
int len,d,b,c,ans;
char a[maxn+];
map<P,int> m1,m2;
int cal(int l,int r){
if(l>r) return ;
int res=;
for(int i=l;i<=r;i++){
res=res*+a[i]-'';
}
return res;
}
void dfs(int l,int r,int sum,int f,int eq){
if(!f){
if(l>r){
m1[P(sum,eq)]++;
return ;
}
for(int i=l;i<=r;i++){
dfs(i+,r,sum+cal(l,i),,eq);
}
} else {
if(l>r){
m2[P(sum,eq)]++;
return ;
}
for(int i=l;i<=r;i++){
dfs(i+,r,sum+cal(l,i),,eq);
}
}
}
int main()
{
// freopen("e://duipai//data.txt","r",stdin);
// freopen("e://duipai//out1.txt","w",stdout);
while(scanf("%s",a)!=EOF){
if(a[]=='E')
break;
len=strlen(a);
ans=;
for(int i=;i<len;i++){
m1.clear();
dfs(,i-,,,i);
m2.clear();
dfs(i,len-,,,i);
map<P,int>::iterator it=m1.begin();
for(;it!=m1.end();++it){
int a=m1[P((*it).first.first,(*it).first.second)];
int b=m2[P((*it).first.first,(*it).first.second)];
if(a&&b) {
ans+=(a*b);
}
}
}
printf("%d\n",ans);
}
return ;
}
hdu4403- A very hard Aoshu problem(搜索)的更多相关文章
- HDU4403 A very hard Aoshu problem DFS
A very hard Aoshu problem Time Limit: 2000/1000 MS (Java/Others) Memory ...
- HDU 4403 A very hard Aoshu problem(DFS)
A very hard Aoshu problem Problem Description Aoshu is very popular among primary school students. I ...
- A very hard Aoshu problem(dfs或者数位)
题目连接:http://acm.hdu.edu.cn/showproblem.php?pid=4403 A very hard Aoshu problem Time Limit: 2000/1000 ...
- hdu 3699 10 福州 现场 J - A hard Aoshu Problem 暴力 难度:0
Description Math Olympiad is called “Aoshu” in China. Aoshu is very popular in elementary schools. N ...
- HDU 3699 A hard Aoshu Problem(暴力枚举)(2010 Asia Fuzhou Regional Contest)
Description Math Olympiad is called “Aoshu” in China. Aoshu is very popular in elementary schools. N ...
- HDU 3699 A hard Aoshu Problem (暴力搜索)
题意:题意:给你3个字符串s1,s2,s3;要求对三个字符串中的字符赋值(同样的字符串进行同样的数字替换), 替换后的三个数进行四则运算要满足左边等于右边.求有几种解法. Sample Input 2 ...
- A very hard Aoshu problem
A very hard Aoshu proble Problem Description Aoshu is very popular among primary school students. It ...
- Codeforces C. NP-Hard Problem 搜索
C. NP-Hard Problem time limit per test:2 seconds memory limit per test:256 megabytes input:standard ...
- UVALive - 5107 - A hard Aoshu Problem
题目链接:https://vjudge.net/problem/UVALive-5107 题目大意:用ABCDE代表不同的数字,给出形如ABBDE___ABCCC = BDBDE的东西: 空格里面可以 ...
随机推荐
- hdu5776sum
题目连接 抽屉原理:如果现在有3个苹果,放进2个抽屉,那么至少有一个抽屉里面会有两个苹果 抽屉原理的运用 现在假设有一个正整数序列a1,a2,a3,a4.....an,试证明我们一定能够找到一段连续 ...
- hdu 6006
HDU - 6006 Engineer Assignment 我参考了这份题解. 贴上我比较拙的代码,留念一下. /** * 想到状态压缩的dp问题就解决了一半. */ #include <st ...
- C字符串末尾的'\0'问题
C语言的字符串要注意最后一位默认是'/0'的问题.这是一个易错点. strlen()计算长度时不考虑末尾的'\0' //例1 void test1() { ]; "; strcpy( str ...
- 【Shell】基础正则表示法及grep用法
——<鸟哥的私房菜> 正规表示法就是处理字串的方法,他是以行为单位来进行字串的处理行为:正规表示法透过一些特殊符号的辅助,可以让使用者轻易的达到『搜寻/删除/取代』某特定字串的处理程序:只 ...
- CodeForces - 613D:Kingdom and its Cities(虚树+DP)
Meanwhile, the kingdom of K is getting ready for the marriage of the King's daughter. However, in or ...
- ContextMenu的自定义
1.针对整个ContextMenu, 自定义一个Style,去掉竖分割线 <Style x:Key="DataGridColumnsHeaderContextMenuSty ...
- C#编译问题'System.Collections.Generic.IEnumerable' does not contain a definition for 'Where' and no extension method 'Where' accepting a first argument
'System.Collections.Generic.IEnumerable<string>' does not contain a definiti ...
- HDU3974(dfs+线段树)
Assign the task Time Limit: 15000/5000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Tot ...
- 响应式web设计,html5和css3实战(@author Ben Fraim)
重定向 //请求重定向简化写法 response.sendRedirect("/day09/adv.html"); 转发 request.getRequestDispatcher( ...
- Python 模拟post请求
# coding:utf-8import requestsurl = "https://passport.cnblogs.com/user/signin" # 接口地址 # 消息头 ...