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 PHP (7.4.4) (judge verdict: Wrong Answer)

<?php

$n = trim(fgets(STDIN));

$count = 0;

for($i=0; $i<$n; $i++) {
    fscanf(STDIN, "%d %d", $a, $b);
    if ($a == $b) {
        $count++;
        if ($count >= 3) {
            break;
        } else {
            continue;
        };
    } elseif ($a != $b && $count > 0) {
        $count--;
    }
}

if ($count >= 3) {
    echo "Yes" . PHP_EOL;
} else {
    echo "No" . PHP_EOL;
}