Submission #1872645

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Source Code Expand

#include<cstdio>
#include<iostream>
using namespace std;
void solve(int a,int b,int c,int d)
{
    for(int i=0;i<=1;i++)
    {
        for(int j=0;j<=1;j++)
        {
            for(int k=0;k<=1;k++)
            {
                int tmp=(i==0)?a-b:a+b;
                tmp+=(j==0)?(-c):c;
                tmp+=(k==0)?(-d):d;
                if(tmp==7)
                {
                    cout<<a;
                    if(i==0) cout<<"-";
                    else cout<<"+";
                    cout<<b;
                    if(j==0) cout<<"-";
                    else cout<<"+";
                    cout<<c;
                    if(k==0) cout<<"-";
                    else cout<<"+";
                    cout<<d<<"="<<"7"<<endl;
                    return;
                }
            }
        }
    }
    return;
}
int main()
{
    char s[10];
    cin>>s;
    solve(s[0]-'0',s[1]-'0',s[2]-'0',s[3]-'0');
    return 0;
}

Submission Info

Judge Result