#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<ll,ll> pii;
typedef pair<ll, ll> pll;
typedef vector<ll> vii;
typedef vector<ll> vll;

#define X first
#define Y second
#define rep(i,n) for(ll i=0; i<(n); i++)
#define repp(i,a,b) for(ll i=a; i<=(b); i++)
#define repp2(i,b,a) for(ll i=b; i>=(a); i--)
#define fill(a,val) memset(a, (val), sizeof(a))
#define mp make_pair
#define pb push_back
#define all(c) (c).begin(), (c).end()
#define uni(c) c.resize(distance(c.begin(), unique(all(c))))
#define io ios_base::sync_with_stdio(false);cin.tie(NULL);
#define IO(input_file_name) ifstream cin(input_file_name);ofstream cout("output.txt")
#define sc(num) scanf("%d",&num)
//#define ONLINE
#ifdef ONLINE
FILE *fin = freopen("great.in","r",stdin);
FILE *fout = freopen("great.out","w",stdout);
#endif

ll mod= 1e9 + 7, mod1=1e9+9;


int main()
{   io;

    pii a[100];
    int n;
    cin>>n;
    rep(i,n){
        cin>>a[i].X>>a[i].Y;
    }
    sort(a,a+n);
    int x1,y1,fl=0,zl=0;
    rep(i,n-1){
        int x=a[i+1].Y-a[i].Y;
        int y=a[i+1].X-a[i].X;
        if(x<0)x*=-1,y*=-1;
        int g=1;
        if(x!=0 && y!=0)g=__gcd(abs(x),abs(y));
        x/=g,y/=g;
        if(x==0 && y==0)continue;
        else if(x==0)y=1;
        else if(y==0)x=1;
        
        if(x!=0 && y!=0)fl=1;
        
        if(zl==0)x1=x,y1=y,zl=1;
        else{
            if(x!=x1 || y!=y1)fl=1;
        }
        
    }
    if(fl)cout<<"NO";
        else cout<<"YES";
        
    
    return 0;
}