#include<bits/stdc++.h>
using namespace std;
int main() {
	int N;
	cin >> N;
	vector<int> A(N);
	vector<int> B(N);
	for(int i = 0; i < N; i++){
		cin >> A.at(i);
		cin >> B.at(i);
	}
	for(int i = 0; i < N-1; i++){
		if(A.at(i) == A.at(i+1)){
			if(B.at(i) == B.at(i+1)){
				cout << "Yes" << endl;
				return 0;
			}
		}
	}
	cout << "No" << endl;
	return 0;
}