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: Wrong Answer)

#include <stdio.h>

int main()
{
  int N;
  scanf("%d", &N);
  int D1[N], D2[N];
  int j;
  for(j=0;j<N;j++){
    scanf("%d", &D1[j]);
    scanf("%d", &D2[j]);
  }

  int i;
  int ans = 0;

  for(i=0;i<N;i++){
    if(D1[i]==D2[i] && D1[i+1]==D2[i+1] && D1[i+2]==D2[i+2] && D1[i]<=6 && D1[i+1]<=6 && D1[i+2]<=6 && 1<=D1[i] && 1<=D1[i+1] &&1<=D1[i+1]){
      ans = 1;
    }
  }

  if(ans==1){
    puts("Yes");
  }else{
    puts("No");
  }

    return 0;
}