at 179b

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define test int t; cin>>t; for(int cs=1;cs<=t;cs++)
int main()
{
   ios_base::sync_with_stdio(0);
   cin.tie(0);cout.tie(0);

   ll a[105][2];
   ll i,j,k,l,d,e,f;
   cin>>d;
   for(i=0;i<d;i++)
   {
       for(j=0;j<2;j++)
       {
           cin>>a[i][j];
       }
   }

   for(i=0;i<d-2;i++)
   {
       if(a[i][0]==a[i][1] && a[i+1][0]==a[i+1][1] && a[i+2][0]==a[i+2][1])
       {
           cout<<"Yes"<<endl;
           return 0;
       }
   }
   cout<<"No"<<endl;
   return 0;
}