29A - Spit Problem

https://mirror.codeforces.com/contest/29/problem/A ~~~~~

include <bits/stdc++.h>

define IOS ios_base::sync_with_stdio(false); cin.tie(0);

using namespace std;

int main() { IOS

int n;
cin >> n;
int x[n], d[n];
x[0] = 0;
d[0] = 0;

for(int i = 0; i < n; i++){ 
    scanf("%d", &x[i]);
    scanf("%d", &d[i]);
}

for(int i = 0; i < n; i++) {
    for(int j = 0; j < n; j++) {
        if ((x[i] + d[i]) == x[j]) {
            if(x[j] + d[j] == x[i]) {
                cout << "YES";
                return 0;
            }
        }
    }
}
cout << "NO";
return 0;

} ~~~~~

Hey, I'm running this code on my terminal, and I'm getting a correct output for all tests.

However, when I submit the code to CodeForces, I fail test case two.

Initially, I was getting an uninitialized value usage, before I initialised arrays x and d, could it be related?