#include<bits/stdc++.h>
using namespace std;
int main(){
int n,x=0,y=0,z=0,temp;
cin>>n;
while(n--){
temp = x;
cin>>x;
x = x+temp;
temp = y;
cin>>y;
y+=temp;
temp = z;
cin>>z;
z+=temp;
}
if(!x&&!y&&!z)
cout<<"YES";
else
cout<<"NO";
}
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