#include <bits/stdc++.h>
#include<stdio.h>
using namespace std;
#define pii pair<long long,long long>
#define F(i,a,b) for(ll i = (ll)(a); i <= (ll)(b); i++)
#define RF(i,a,b) for(ll i = (ll)(a); i >= (ll)(b); i--)
#define PI 3.14159265
#define ll long long
#define f first
#define s second
#define pb(x) push_back(x)
#define mp(x,y) make_pair(x,y)
#define debug(x) cout << #x << " = " << x << endl
#define INF 1000000009
#define mod 1000000007

int n;

int main()
{
ios_base::sync_with_stdio(false);
cin.tie(0);

int x,y,px=0,py=0,x2,y2,flag=0,i;

cin>>n;

cin>>px>>py;
if(px==0)
{
cin>>x>>y;
if(n==2&&x==0)
cout<<"YES";
else
{
for(i=2;i<n;i++)
{

    cin>>x2>>y2;

    if(x2!=0)
     {  flag=1;
         break;
     }

}
if(flag==1) cout<<"NO";
else cout<<"YES";
}
}
else if(py==0)
{
cin>>x>>y;
if(n==2&&y==0)
cout<<"YES";
else
{
for(i=2;i<n;i++)
{

    cin>>x2>>y2;

    if(y2!=0)
     {  flag=1;
         break;
     }

}
if(flag==1) cout<<"NO";
else cout<<"YES";
}
}
else
{cin>>x>>y;
if(n==2)
cout<<"YES";
else
{
for(i=2;i<n;i++)
{

    cin>>x2>>y2;
    if(!(x-px||(x2-x)==0))
    {if(!((y-py)/(x-px)==(y2-y)/(x2-x)))
     {  flag=1;
         break;
     }
    }
    else
    {
     if(y-py!=y2-y)
        {  flag=1;
         break;
     }
    }


}
if(flag==1) cout<<"NO";
else cout<<"YES";
}
}
return 0;
}