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

int main(){
    int n;
    cin >> n;
    vector<pair<int, int>> p(n);
    for(auto& [x, y] : p) cin >> x >> y;
    for(int i = n; i--; ) for(int j = i; j--; ) for(int k = j; k--; ){
        auto [x1, y1] = p[i];
        auto [x2, y2] = p[j];
        auto [x3, y3] = p[k];
        x1 -= x3;
        x2 -= x3;
        y1 -= y3;
        y2 -= y3;
        if(x1 * y2 == x2 * y1){
            puts("Yes");
            return 0;
        }
    }
    puts("No");
}