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: Accepted)

<?php
$N = (int)trim(fgets(STDIN));
//$S = trim(fgets(STDIN));
//list($a,$b,$c,$d) = array_map('intval',explode(" ",trim(fgets(STDIN))));
//$A = array_map('intval',explode(" ",trim(fgets(STDIN))));

for($i=0;$i<$N;$i++) {
  list($a,$b) = array_map('intval',explode(" ",trim(fgets(STDIN))));
  if ($a==$b) {
    $zolo[]=1;
  }
  else {
    $zolo[]=0;
  }
}
for($i=2;$i<count($zolo);$i++) {
  if ($zolo[$i-1]==$zolo[$i] && $zolo[$i-2]==$zolo[$i] && $zolo[$i]==1) {
    echo "Yes";
    exit;
  }
}
echo "No";