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 (Clang 10.0.0) (judge verdict: Runtime Error)

#include <stdio.h>
int main(void){
    // Your code here!
    int n,dice[1][1000];
    scanf("%d",&n);
    int sum=0,flag=0;
    for(int i=1;i<=n;i++){
    scanf("%d%d",&dice[0][i],&dice[1][i]);
    if(dice[0][i]==dice[1][i]) sum++;
    else sum=0;
    if(sum==3) {flag =1;
    break;
    }
    }
    if(flag==1) printf("Yes\n");
    else printf("No\n");
    return 0;
    
}