Submission #3789148

---

Source Code Expand

#include<iostream>
#include <cstdlib>
#include <iostream>
#include <string>
#include <typeinfo>
#include<vector>
using namespace std;

vector<int> num(4);
vector<string> ans(3);

void set_array(int n){
    if(n < 10){
        num[0] = 0;
        num[1] = 0;
        num[2] = 0;
        num[3] = n;
    }
    else if(n < 100){
        num[0] = 0;
        num[1] = 0;
        num[2] = n / 10;
        num[3] = n % 10;
    }
    else if(n < 1000){
        num[0] = 0;
        num[1] = n / 100;
        num[2] = (n - num[1] * 100) / 10;
        num[3] = n - num[1] * 100 - num[2] * 10;
    }
    else{
        num[0] = n / 1000;
        num[1] = (n - num[0] * 1000) / 100;
        num[2] = (n - num[0] * 1000 - num[1] * 100) / 10;
        num[3] = n - num[0] * 1000 - num[1] * 100 - num[2] * 10;
    }
}

void cal(int a, int b, int c, int d){
    if(a + b + c + d == 7){
        ans[0] = "+";
        ans[1] = "+";
        ans[2] = "+";
    }
    else if(a + b + c - d == 7){
        ans[0] = "+";
        ans[1] = "+";
        ans[2] = "-";
    }
    else if(a + b - c + d == 7){
        ans[0] = "+";
        ans[1] = "-";
        ans[2] = "+";
    }
    else if(a - b + c + d == 7){
        ans[0] = "-";
        ans[1] = "+";
        ans[2] = "+";
    }
    else if(a - b - c - d == 7){
        ans[0] = "-";
        ans[1] = "-";
        ans[2] = "-";
    }
    else if(a - b - c + d == 7){
        ans[0] = "-";
        ans[1] = "-";
        ans[2] = "+";
    }
    else if(a - b + c - d == 7){
        ans[0] = "-";
        ans[1] = "+";
        ans[2] = "-";
    }
    else if(a + b - c - d == 7){
        ans[0] = "+";
        ans[1] = "-";
        ans[2] = "-";
    }
}

int main(){
    string str;
    cin >> str;
    int n = atoi(str.c_str());

    set_array(n);
    cal(num[0], num[1], num[2], num[3]);

    cout << num[0] << ans[0] << num[1] << ans[1] << num[2] << ans[2] << num[3] << "=7" << endl;

    //cout << num[0] << num[1] << num[2] << num[3] <<endl;
    return 0;
}

Submission Info

Judge Result