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 Haskell (GHC 8.8.3) (judge verdict: Accepted)

import qualified Data.Text.Lazy as T
import qualified Data.Text.Lazy.IO as T
import qualified Data.Text.Lazy.Read as T
import Data.List (group)
import Data.Bool (bool)

main :: IO ()
main = do
  n <- unsafeTextToInt <$> T.getLine :: IO Int
  ds <- map (uncurry (==) . unsafeListToPair . map unsafeTextToInt . T.words) . T.lines <$> T.getContents :: IO [Bool]
  putStrLn . bool "No" "Yes" . any (3 <=) . map snd . filter fst . map ((,) <$> head <*> length) . group $ ds

unsafeListToPair :: [Int] -> (Int, Int)
unsafeListToPair = (,) <$> head <*> head . tail
{-# INLINE unsafeListToPair #-}

unsafeTextToInt :: T.Text -> Int
unsafeTextToInt s = case T.signed T.decimal s of
  Right (n, _) -> n
{-# INLINE unsafeTextToInt #-}