#include <bits/stdc++.h>

using namespace std;


int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);

    int n, a, b, c, x = 0, y = 0, z = 0;
    cin >> n;

    for(int i = 0; i < n; ++i){
        cin >> a >> b >> c;
        x += a;
        y += b;
        z += c;
    }

    if(x == 0 && y == 0 && z == 0){
        cout << "YES";
    } else{
        cout << "NO";
    }

    cout << flush;

    return 0;
}