奇怪？

注意“NO”中“O”是数字“0”！（我错了好几回）

#include <bits/stdc++.h>
using namespace std;
int n;
int main() {
    cin >> n;
    while(n--){
        int a,b,c,d;
        cin >> a >> b >> c >> d;
        if(a == b && b == c && c == d){
            cout << "YES" << endl;
        } else if(a == b){
            if(c == d){
                cout << "YES" << endl;
            } else {
                cout << "N0" << endl;
            }
        } else if(a == c){
            if(b == d){
                cout << "YES" << endl;
            } else {
                cout << "N0" << endl;
            }
        } else if(a == d){
            if(b == c){
                cout << "YES" << endl;
            } else {
                cout << "N0" << endl;
            }
        } else {
            cout << "N0" << endl;
        } 
    }
    return 0;
}