#include <bits/stdc++.h>

using namespace std;
#define ll long long
#define pb push_back

bool valid(int x1, int x2, int x3, int y1, int y2, int y3)
{
	int a = (x1-x2)*(y2-y3);
	int b = (x2-x3)*(y1-y2);
	//if((int)floor(a)==(int)floor(b) && (int)ceil(a)==(int)ceil(b) ) return true;
	if(a==b) return true;
	return false;
}

int main()
{
	int t;
	cin >> t;
	vector< pair< int, int > > v;
		int n = t;
	while(t--) {
		int a, b;
		cin >> a >> b;
		v.pb({a, b});
	}
	//cout << 3 << endl;
	int cnt = 0, mx = 0;
	int i, j, k;
	for(i=0; i<n-2; i++) {
		for(j=i+1; j<n-1; j++) {
			for(k=j+1; k<n; k++) {
				if(valid(v[i].first, v[j].first, v[k].first, v[i].second, v[j].second, v[k].second)){
					cnt++;
				}
			}
			mx = max(mx, cnt);
		}
	}
	//cout << mx << endl;
	if(mx>=1) cout << "Yes\n";
	else cout << "No\n";
	return 0;
}