69A - Young Physicist Solution in C++

69A - Young Physicist.cpp

#include<iostream>

int main(){
    int n, x, y, z, xf(0), yf(0) ,zf(0);
    std::cin>>n;
    for(int i=0; i<n; i++){
        std::cin>>x>>y>>z;
        xf+=x;
        yf+=y;
        zf+=z;
    }
    if(xf==0 && yf==0 && zf==0){
        std::cout<<"YES";
    }else{
        std::cout<<"NO";
    }
    return 0;
}