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.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        int N = Integer.parseInt(in.nextLine());
        int countDoublets = 0;
        boolean threeConsecutive = false;
        for (int i = 0 ; !threeConsecutive && i < N; i++) {
            String[] read = in.nextLine().split(" ");
            int d1 = Integer.parseInt(read[0]), d2 = Integer.parseInt(read[1]);
            if (d1 == d2) {
                countDoublets++;
                if (countDoublets == 3) {
                    System.out.println("Yes");
                    threeConsecutive = true;
                }
            } else {
                countDoublets = 0;
            }
        }

        if (!threeConsecutive)
            System.out.println("No");

    }
}