#include<bits/stdc++.h>

using namespace std;

#define lowbit(x) ((x)&(-x))

typedef long long LL;

void run_case() {

    int n;

    cin >> n;

    vector<int> x(n+), y(n+);

    for(int i = ; i <= n; ++i) cin >> x[i] >> y[i];

    if(n & ) {

        cout << "NO";

        return;

    }

    n >>= ;

    for(int i = ; i <= n; ++i)

        if(x[i+]-x[i] != x[(i+n)]-x[(i+n)%(*n)+] || y[i+]-y[i] != y[(i+n)]-y[(i+n)%(*n)+]) {

            cout << "NO";

            return;

        }

    cout << "YES";

}

int main() {

    ios::sync_with_stdio(false), cin.tie();

    //int t; cin >> t;

    //while(t--)

    run_case();

    cout.flush();

    return ;

}