
import java.util.*;
public class Main {
	public static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) 
	{
		int n = sc.nextInt();
		int[][]arr = new int[n][2];
		for(int i=0;i<n;i++)
		{
			arr[i][0] = sc.nextInt();
			arr[i][1] = sc.nextInt();
		}
		boolean flag = false;
		for(int i=0;i<n-2;i++)
		{
			if((arr[i][0]==arr[i][1]) && (arr[i+1][0]==arr[i+1][1]) && (arr[i+2][0]==arr[i+2][1]))
			{
				flag = true;
				break;
			}
		}
		if(flag)
			System.out.println("Yes");
		else
			System.out.println("No");

	}

} import java.util.*; util.* java public class Main {
	public static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) 
	{
		int n = sc.nextInt();
		int[][]arr = new int[n][2];
		for(int i=0;i<n;i++)
		{
			arr[i][0] = sc.nextInt();
			arr[i][1] = sc.nextInt();
		}
		boolean flag = false;
		for(int i=0;i<n-2;i++)
		{
			if((arr[i][0]==arr[i][1]) && (arr[i+1][0]==arr[i+1][1]) && (arr[i+2][0]==arr[i+2][1]))
			{
				flag = true;
				break;
			}
		}
		if(flag)
			System.out.println("Yes");
		else
			System.out.println("No");

	}

} Main public static Scanner sc = new Scanner(System.in); sc new Scanner(System.in) public static void main(String[] args) 
	{
		int n = sc.nextInt();
		int[][]arr = new int[n][2];
		for(int i=0;i<n;i++)
		{
			arr[i][0] = sc.nextInt();
			arr[i][1] = sc.nextInt();
		}
		boolean flag = false;
		for(int i=0;i<n-2;i++)
		{
			if((arr[i][0]==arr[i][1]) && (arr[i+1][0]==arr[i+1][1]) && (arr[i+2][0]==arr[i+2][1]))
			{
				flag = true;
				break;
			}
		}
		if(flag)
			System.out.println("Yes");
		else
			System.out.println("No");

	} main {
		int n = sc.nextInt();
		int[][]arr = new int[n][2];
		for(int i=0;i<n;i++)
		{
			arr[i][0] = sc.nextInt();
			arr[i][1] = sc.nextInt();
		}
		boolean flag = false;
		for(int i=0;i<n-2;i++)
		{
			if((arr[i][0]==arr[i][1]) && (arr[i+1][0]==arr[i+1][1]) && (arr[i+2][0]==arr[i+2][1]))
			{
				flag = true;
				break;
			}
		}
		if(flag)
			System.out.println("Yes");
		else
			System.out.println("No");

	} int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int[][]arr = new int[n][2]; arr new int[n][2] n 2 for(int i=0;i<n;i++)
		{
			arr[i][0] = sc.nextInt();
			arr[i][1] = sc.nextInt();
		} int i=0; int i=0; i 0 i<n i n i++ i++ i {
			arr[i][0] = sc.nextInt();
			arr[i][1] = sc.nextInt();
		} {
			arr[i][0] = sc.nextInt();
			arr[i][1] = sc.nextInt();
		} arr[i][0] = sc.nextInt() arr[i][0] arr[i] arr i 0 sc.nextInt() sc.nextInt sc arr[i][1] = sc.nextInt() arr[i][1] arr[i] arr i 1 sc.nextInt() sc.nextInt sc boolean flag = false; flag false for(int i=0;i<n-2;i++)
		{
			if((arr[i][0]==arr[i][1]) && (arr[i+1][0]==arr[i+1][1]) && (arr[i+2][0]==arr[i+2][1]))
			{
				flag = true;
				break;
			}
		} int i=0; int i=0; i 0 i<n-2 i n-2 n 2 i++ i++ i {
			if((arr[i][0]==arr[i][1]) && (arr[i+1][0]==arr[i+1][1]) && (arr[i+2][0]==arr[i+2][1]))
			{
				flag = true;
				break;
			}
		} {
			if((arr[i][0]==arr[i][1]) && (arr[i+1][0]==arr[i+1][1]) && (arr[i+2][0]==arr[i+2][1]))
			{
				flag = true;
				break;
			}
		} if((arr[i][0]==arr[i][1]) && (arr[i+1][0]==arr[i+1][1]) && (arr[i+2][0]==arr[i+2][1]))
			{
				flag = true;
				break;
			} (arr[i][0]==arr[i][1]) && (arr[i+1][0]==arr[i+1][1]) && (arr[i+2][0]==arr[i+2][1]) (arr[i][0]==arr[i][1]) && (arr[i+1][0]==arr[i+1][1]) && (arr[i+2][0]==arr[i+2][1]) (arr[i][0]==arr[i][1]) arr[i][0] arr[i] arr i 0 arr[i][1] arr[i] arr i 1 (arr[i+1][0]==arr[i+1][1]) arr[i+1][0] arr[i+1] arr i+1 i 1 0 arr[i+1][1] arr[i+1] arr i+1 i 1 1 (arr[i+2][0]==arr[i+2][1]) arr[i+2][0] arr[i+2] arr i+2 i 2 0 arr[i+2][1] arr[i+2] arr i+2 i 2 1 {
				flag = true;
				break;
			} flag = true flag true break; if(flag)
			System.out.println("Yes");
		else
			System.out.println("No"); flag System.out.println("Yes") System.out.println System.out System System.out "Yes" System.out.println("No") System.out.println System.out System System.out "No" String[] args args public class Main {
	public static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) 
	{
		int n = sc.nextInt();
		int[][]arr = new int[n][2];
		for(int i=0;i<n;i++)
		{
			arr[i][0] = sc.nextInt();
			arr[i][1] = sc.nextInt();
		}
		boolean flag = false;
		for(int i=0;i<n-2;i++)
		{
			if((arr[i][0]==arr[i][1]) && (arr[i+1][0]==arr[i+1][1]) && (arr[i+2][0]==arr[i+2][1]))
			{
				flag = true;
				break;
			}
		}
		if(flag)
			System.out.println("Yes");
		else
			System.out.println("No");

	}

} public class Main {
	public static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) 
	{
		int n = sc.nextInt();
		int[][]arr = new int[n][2];
		for(int i=0;i<n;i++)
		{
			arr[i][0] = sc.nextInt();
			arr[i][1] = sc.nextInt();
		}
		boolean flag = false;
		for(int i=0;i<n-2;i++)
		{
			if((arr[i][0]==arr[i][1]) && (arr[i+1][0]==arr[i+1][1]) && (arr[i+2][0]==arr[i+2][1]))
			{
				flag = true;
				break;
			}
		}
		if(flag)
			System.out.println("Yes");
		else
			System.out.println("No");

	}

} Main

import java.util.*;
public class Main {
	public static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) 
	{
		int n = sc.nextInt();
		int[][]arr = new int[n][2];
		for(int i=0;i<n;i++)
		{
			arr[i][0] = sc.nextInt();
			arr[i][1] = sc.nextInt();
		}
		boolean flag = false;
		for(int i=0;i<n-2;i++)
		{
			if((arr[i][0]==arr[i][1]) && (arr[i+1][0]==arr[i+1][1]) && (arr[i+2][0]==arr[i+2][1]))
			{
				flag = true;
				break;
			}
		}
		if(flag)
			System.out.println("Yes");
		else
			System.out.println("No");

	}

}
