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 Fortran (GNU Fortran 9.2.1) (judge verdict: Accepted)

      PROGRAM piyo
      IMPLICIT NONE
      integer :: n,i
      integer,allocatable :: d1(:),d2(:)
      character(3) :: ans = 'No '
      
      read*,n
      allocate( d1(n),d2(n) )
      do i = 1,n
        read*,d1(i),d2(i)
      end do
      
      
      do i = 2,n-1
        
        if( d1(i-1)/=d2(i-1) )cycle
        if( d1(i)/=d2(i) )cycle
        if( d1(i+1)/=d2(i+1) )cycle
        
        ans = 'Yes'
        
      end do
      
      
      print*,ans
      
      
      stop
      !debugg
      
      
      
      END PROGRAM