#include <map>
#include <set>
#include <list>
#include <cmath>
#include <ctime>
#include <deque>
#include <queue>
#include <stack>
#include <string>
#include <bitset>
#include <cstdio>
#include <limits>
#include <vector>
#include <climits>
#include <cstring>
#include <cstdlib>
#include <fstream>
#include <numeric>
#include <sstream>
#include <iostream>
#include <algorithm>
#include <unordered_map>

using namespace std;


int main(){
    int n;
    cin >> n;
    int x,y;
    int temp1=0,temp2=0;
    for(int i = 0; i < n; i++){
        cin>>x>>y;
        temp1=temp1+x;
        temp2=temp2+y;
    }
    if((temp1/n==x&&temp1%n==0)||(temp2/n==y&&temp2%n==0))
    {
      cout<<"YES";
    }
    else
        cout<<"NO";
    return 0;
}