Problem:
Score : 200 points

Problem Statement

Tak performed the following action N times: rolling two dice.
The result of the i-th roll is D_{i,1} and D_{i,2}.

Check if doublets occurred at least three times in a row.
Specifically, check if there exists at lease one i such that D_{i,1}=D_{i,2}, D_{i+1,1}=D_{i+1,2} and D_{i+2,1}=D_{i+2,2} hold.

Constraints

3 \leq N \leq 100

1\leq D_{i,j} \leq 6

All values in input are integers.

Input

Input is given from Standard Input in the following format:

N
D_{1,1} D_{1,2}
\vdots
D_{N,1} D_{N,2}

Output

Print Yes if doublets occurred at least three times in a row. Print No otherwise.

Sample Input 1

5
1 2
6 6
4 4
3 3
3 2

Sample Output 1

Yes

From the second roll to the fourth roll, three doublets occurred in a row.

Sample Input 2

5
1 1
2 2
3 4
5 5
6 6

Sample Output 2

No

Sample Input 3

6
1 1
2 2
3 3
4 4
5 5
6 6

Sample Output 3

Yes

Solution in Java (OpenJDK 11.0.6) (judge verdict: Accepted)

import java.util.*;
import java.io.*;
import java.math.BigInteger;
 
public class Main {
	public static long mod = 1000000007;
	
	public static void main(String[] args) {
	Scanner s = new Scanner(System.in);
	int N = s.nextInt();
	boolean is = false;
	int[][] D = new int[N][2];
	for(int i = 0; i < N; i++){
		D[i][0] = s.nextInt();
		D[i][1] = s.nextInt();
	}

	for(int i = 0; i < N-2; i++){
		if((D[i][0]==D[i][1]) && (D[i+1][0]==D[i+1][1]) && (D[i+2][0]==D[i+2][1])){
			is = true;
		}
	}
	if(is){
		System.out.println("Yes");
	}else{
		System.out.println("No");
	}
	
    
  }
}