#include<bits/stdc++.h>
using namespace std;
using u64 = uint_least64_t;
using s64 = int_least64_t;
using ll = uint_least64_t;

int main(){
	u64 n;
	cin >> n;
	vector<u64> a(n),b(n);
	for (u64 i = 0; i < n; i++){
		cin >> a[i] >> b[i];
	} 

	cout << "Yes" << endl;
	return 0;
}