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 Lua (Lua 5.3.5) (judge verdict: Accepted)

-- Vicfred
-- https://atcoder.jp/contests/abc179/tasks/abc179_b
-- simulation
n = io.read("*n")

b = {}
d = {}
for i = 1, n do b[i], d[i] = io.read("*n", "*n") end

flag = false

for i = 1, n-2 do
   if b[i] == d[i] and
       b[i + 1] == d[i + 1] and
       b[i + 2] == d[i + 2] then
       flag = true
   end
end

if flag then
    print("Yes")
else
    print("No")
end