#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ff first
#define ss second
#define pb push_back
#define db double
#define INF 1e9
#define mod (10000000007)
#define fof(i, a, b) for(int i=a;i<=b;i++)
#define fho(i, a, b) for(int i=a;i<b;i++)
#define pho(i, a, b) for(int i=a;i>=b;i--)
#define pfo(i, a, b) for(int i=a-1;i>=b;i--)
#define mask(i) ((1 << i) & 1)
#define speech ios_base::sync_with_stdio(false);
 
typedef pair < ll , ll > ii;
typedef pair < ii , ii > iii;
typedef vector < ll > vi;
typedef vector < ii > vii;
typedef vector < char > vc;
typedef pair < string , int > si;
 
bool th(ii a, ii b, ii c)
{
    ii x, y;
    x.ff = b.ff - a.ff, x.ss = b.ss - a.ss;
    y.ff = c.ff - a.ff, y.ss = c.ss - a.ss;
    if(x.ff * y.ss == x.ss * y.ff) return true;
    return false;
}
 
ii a[20];

int main()
{
	int n;
	cin >> n;
	fof(i, 1, n) cin >> a[i].ff >> a[i].ss;
	a[n + 1] = a[1];
	a[n + 2] = a[2];
	a[n + 3] = a[3];
	a[n + 4] = a[4];
	fof(i, 3, n + 4)
		if(!th(a[i - 2], a[i - 1], a[i]))
			return cout << "NO", 0;
	if(n == 2) 
	{
	    if(a[1].ff == a[2].ff || a[1].ss == a[2].ss) cout << "YES";
	    else cout << "NO";
	    return 0;
	}
		cout << "YES";
}