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 C (GCC 9.2.1) (judge verdict: Accepted)

#include<stdio.h>
#include <string.h>
int main(void)
{
  int D1[100],D2[100],i=0,N,cnt=0,ans=0;
  
  scanf("%d",&N);
  for(i;i<N;i++)
  {
    scanf("%d %d",&D1[i],&D2[i]);
    if(D1[i]==D2[i]){
      cnt++;
      if(cnt>=3){ans=1;}
    }else{
      cnt=0;
    }
  }
  
  if(ans==1){
    printf("Yes");
  }else{
    printf("No");
  }
  
  return 0;
}