Submission #2236507

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Source Code Expand

#include<iostream>
#include<string>
#include<algorithm>
#include<cmath>
using namespace std;

int main(){
    string s;
    cin>>s;
    int A[4];
    int op;

    for(int i = 0; i < 4; i++) A[i] = (int)(s[i]-'0');

    for(op = 0; op < (1<<3); op++){
        int res = A[0];
        for(int i = 1; i < 4;i++){
            if(op & (1 << (i-1))) res += A[i];
            else res -= A[i];
        }

        if(res == 7){
            cout<<A[0];
            for(int i = 1; i<4;i++){
                if(op & (1 << (i-1))) cout<<"+";
                else cout<<"-";
                cout<<A[i];
            }
            cout<<"=7\n";
        }

    }
   



}

Submission Info

Judge Result