Score : 200 points
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.
Input is given from Standard Input in the following format:
N D_{1,1} D_{1,2} \vdots D_{N,1} D_{N,2}
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