Not so Mobile UVA - 839

#include <iostream>
#include <bits/stdc++.h>
using namespace std;

int solve(int &w)
{
    int w1,w2,d1,d2;
    bool b1 = true,b2 = true;
    cin>>w1>>d1>>w2>>d2;
    if(!w1) b1 = solve(w1);
    if(!w2) b2 = solve(w2);
    w = w1+w2;
    return b1&&b2&&(w1*d1 == w2*d2);
}

int main()
{
    int n,w;
    cin>>n;
    while(n--)
    {
        if(solve(w)) cout<<"YES"<<endl;
        else cout<<"NO"<<endl;
        if(n) cout<<endl;
    }
    return 0;
}
/**
1
0 2 0 4
0 3 0 1
1 1 1 1
2 4 4 2
1 6 3 2
**/