30 lines
414 B
C++
30 lines
414 B
C++
#include <bits/stdc++.h>
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using namespace std;
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int main(){
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ios::sync_with_stdio(0);
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cin.tie(0);
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int n, a, b, c, x = 0, y = 0, z = 0;
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cin >> n;
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for(int i = 0; i < n; ++i){
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cin >> a >> b >> c;
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x += a;
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y += b;
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z += c;
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}
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if(x == 0 && y == 0 && z == 0){
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cout << "YES";
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} else{
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cout << "NO";
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}
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cout << flush;
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return 0;
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}
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