CF_69A

// Codeforces Round 69A
#include <iostream>
using namespace std;
int main()
{
    int n, x,y,z, sumx=0,sumy=0,sumz=0;
    cin >> n;
    for(int i = 0; i < n; i++)
    {
        cin >> x >> y >> z;
        sumx+=x;
        sumy+=y;
        sumz+=z;
    }
    if(sumx==0 && sumy==0 && sumz==0){cout<<"YES";}
    else{cout<<"NO";}
    return 0;
}