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 1.8.0) (judge verdict: Accepted)

import java.util.*;
public class Main  {
    public static void main(String[] args) {
        Scanner sc =new Scanner (System.in);
        int n=sc.nextInt();
        int []arr1=new int[n];
        int []arr2=new int[n];
        for(int i=0;i<n;i++)
        {
            arr1[i]=sc.nextInt();
            arr2[i]=sc.nextInt();
        }
        int res[]=new int [n];
        for(int i=0;i<n;i++)
        {
            if(arr1[i]==arr2[i])
            {
                res[i]=1;
            }
        }
        boolean flag=false;
        for(int i=0;i+2<n;i++)
        {
            if(res[i]==res[i+1]&&res[i+1]==res[i+2]&&res[i+2]==1)
            {
                flag=true;
            }
        }
        if(flag==true)
        {
            System.out.println("Yes");
        }
        else
        {
            System.out.println("No");
        }
        // String s=sc.nextLine();
        // int length=s.length();
        // char c=s.charAt(length-1);
        // if(Character.isLowerCase(c))
        // {
        //     if(c=='s')
        //     {
        //         System.out.println(s+"es");
        //     }
        //     else{
        //         System.out.println(s+"s");
        //     }
        // }
        sc.close();
    }
}