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++ (Clang 10.0.0) (judge verdict: Accepted)

//////////////////////////
//      _        ____   //
//  U  /"\  u U /"___|  //
//   \/ _ \/  \| | u    //
//   / ___ \   | |/__   //
//  /_/   \_\   \____|  //
//   \\    >>  _// \\   //
//  (__)  (__)(__)(__)  //
//  Compro by NULL_CT©  //
//////////////////////////
// STL libs
#include <algorithm>
#include <array>
#include <bits/stdint-intn.h>
#include <bitset>
#include <cctype>
#include <chrono>
#include <climits>
#include <cmath>
#include <complex>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <deque>
#include <functional>
#include <iomanip>
#include <ios>
#include <iostream>
#include <iterator>
#include <map>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <thread>
#include <tuple>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>

// Boost
#include <boost/multiprecision/cpp_int.hpp>
#include <boost/range/irange.hpp>

#define ALL(LIST) (LIST.begin()), (LIST.end())

using namespace std;
using boost::irange;
using boost::multiprecision::cpp_int;

constexpr int64_t MOD = 1000000007;

vector<int64_t> divisor(const int64_t &_n) {
  vector<int64_t> head, tail;
  for (int64_t i = 1; i * i <= _n; i++) {
    if (_n % i == 0) {
      head.push_back(i);
      if (i * i != _n)
        tail.push_back(_n / i);
    }
  }
  head.insert(head.end(), tail.rbegin(), tail.rend());
  return head;
}

int64_t kadanes(const vector<int64_t> &_ls) {
  int64_t highestMax = 0, currentMax = 0, length = _ls.size();
  for (int64_t i = 0; i < length; i++) {
    currentMax = max(_ls[i], currentMax + _ls[i]);
    highestMax = max(highestMax, currentMax);
  }
  return highestMax;
}

void execution();

int main() {
  cin.tie(nullptr);
  ios::sync_with_stdio(false);
  // cout<<fixed<<setprecision(20);

  execution();
  return 0;
}

//--------------------------------------------------------------
void execution() {
  int n;
  cin>>n;
  vector<pair<int,int>> d(n);
  for(int i:irange(n)){
    cin>>d[i].first>>d[i].second;
  }

  int cnt=0;
  for(auto i:d){
    if(i.first == i.second){
      cnt++;
    }else{
      cnt=0;
    }
    if(3 <= cnt){
      cout<<"Yes\n";
      return;
    }
  }
  cout<<"No\n";
}