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 C++ (GCC 9.2.1) (judge verdict: Wrong Answer)

/*******************************
* BASMILLAHHIR RAHMANNIR RAHIM *
* MD SHAHINUR RAHMAN           *
* DATE: 16/sep/2020            *
* DEPT. OF CSE                 *
* LEADING UNIVERSITY, SYLHET   *
*******************************/
#include<bits/stdc++.h>
#include<vector>
#include<algorithm>
#include<string>
#include<stdlib.h>
#include<math.h>
#define shahin std::ios_base::sync_with_stdio(false); std::cin.tie(NULL);
#define ll long long
#define pb push_back
#define sz(x) (int)(x).size()
const int nax=1000*1007;
const int mod = 1e9 + 7;
 
using namespace std;
char wcz[nax];
 
bool fu(int a, int b){
    return (a>b);
}
int gcd(int x,int y){
    return x?gcd(y%x, x):y;
}
 
void fun(){
    int tc,i=1,sum=0,A=0,B=0;
    cin >> tc;
    while(tc--)
    {
                int a, b;
                cin >> a>>b;
                   A+= a;
                   B+= b;
    }
  //  cout << A << " "<< B;
    if(A<B)cout<<"No";
    else cout << "Yes";
}
int main()
{
    shahin
 /*   int tc,i=1,sum=0,A=0,B=0;
    cin >> tc;
    while(tc--)
    {
    //cout << "Case " << i << ": ";
        fun();
    //i++;
    }*/ 
    fun();
   
}