HDU_4403

http://acm.hdu.edu.cn/showproblem.php?pid=4403

数值不大，暴力枚举，枚举每一种划分，然后枚举每一种等号位置。

#include<iostream>
#include<string>
#include<cstring>
using namespace std;
string str;
int len;
int main()
{
    while(cin >> str && str != "END")
    {
        len = str.size();
        int counts = 1,ans = 0;
        for(int i = 1;i < len;i++) counts *= 2;
        for(int i = 1;i < counts;i++)
        {
            int a[20] = {0};
            int now = 0,temp = i,num = 1;
            while(now < len)
            {
                a[num] = a[num]*10+str[now]-'0';
                if(temp%2)  num++;
                temp /= 2;
                now++;
            }
            for(int j = 1;j < num;j++)
            {
                int k,left = 0,right = 0;
                for(k = 1;k <= j;k++)    left += a[k];
                for(;k <= num;k++)  right += a[k];
                if(left == right)   ans++;
            }
        }
        cout << ans << endl;
    }
    return 0;
}