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 Ruby (2.7.1) (judge verdict: Accepted)

n = gets.chomp.to_i                                                           
                                                                              
                                                                              
yes_times = 0                                                                 
answer = 'No'                                                                 
                                                                              
n.times do                                                                    
  line = gets.chomp.split(" ").map(&:to_i)                                    
  if line[0] == line[1]                                                       
    yes_times += 1                                                            
  else                                                                        
    yes_times = 0                                                             
  end                                                                         
  if yes_times > 2                                                            
    answer = 'Yes'                                                            
    break                                                                     
  end                                                                         
end                                                                           
print answer