#include <bits/stdc++.h>
using namespace std;
 
int main(){
	
	int N;
	cin >> N ;
	
	 vector<int> A(N);
	
	for(int i = 0 ; i < N ;i++){
		
		int a;
		cin >> a;
		
		A.at(i)= a;
	}
	
		
	for(int i = 0; i < N-1 ; i++){
		
		if( A.at(i) == A.at(i+1)){
			
			cout << "Yes" << endl;
			
		}else if(A.at(i) == A.at(i+2)){
				
				cout << "Yes" << endl;
				
			}else{
				cout << "No" << endl;
			}
		
	}
}