B - Go to Jail

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.

5
1 2
6 6
4 4
3 3
3 2

Yes

From the second roll to the fourth roll, three doublets occurred in a row.

5
1 1
2 2
3 4
5 5
6 6

No

6
1 1
2 2
3 3
4 4
5 5
6 6

Yes