import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		
		int dd = 0;
		for(int i=0; i<n;i++) {
			int d1 = sc.nextInt();
			int d2 = sc.nextInt();
			if ( d1 == d2 ) {
				dd++;
				if(dd>=3) {
					System.out.println("Yes");
					System.exit(0);
				}
			}else{
				dd=0;
			}
		}
		System.out.println("No");

	}
	
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		
		int dd = 0;
		for(int i=0; i<n;i++) {
			int d1 = sc.nextInt();
			int d2 = sc.nextInt();
			if ( d1 == d2 ) {
				dd++;
				if(dd>=3) {
					System.out.println("Yes");
					System.exit(0);
				}
			}else{
				dd=0;
			}
		}
		System.out.println("No");

	}
	
} Main public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		
		int dd = 0;
		for(int i=0; i<n;i++) {
			int d1 = sc.nextInt();
			int d2 = sc.nextInt();
			if ( d1 == d2 ) {
				dd++;
				if(dd>=3) {
					System.out.println("Yes");
					System.exit(0);
				}
			}else{
				dd=0;
			}
		}
		System.out.println("No");

	} main {
		
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		
		int dd = 0;
		for(int i=0; i<n;i++) {
			int d1 = sc.nextInt();
			int d2 = sc.nextInt();
			if ( d1 == d2 ) {
				dd++;
				if(dd>=3) {
					System.out.println("Yes");
					System.exit(0);
				}
			}else{
				dd=0;
			}
		}
		System.out.println("No");

	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int dd = 0; dd 0 for(int i=0; i<n;i++) {
			int d1 = sc.nextInt();
			int d2 = sc.nextInt();
			if ( d1 == d2 ) {
				dd++;
				if(dd>=3) {
					System.out.println("Yes");
					System.exit(0);
				}
			}else{
				dd=0;
			}
		} int i=0; int i=0; i 0 i<n i n i++ i++ i {
			int d1 = sc.nextInt();
			int d2 = sc.nextInt();
			if ( d1 == d2 ) {
				dd++;
				if(dd>=3) {
					System.out.println("Yes");
					System.exit(0);
				}
			}else{
				dd=0;
			}
		} {
			int d1 = sc.nextInt();
			int d2 = sc.nextInt();
			if ( d1 == d2 ) {
				dd++;
				if(dd>=3) {
					System.out.println("Yes");
					System.exit(0);
				}
			}else{
				dd=0;
			}
		} int d1 = sc.nextInt(); d1 sc.nextInt() sc.nextInt sc int d2 = sc.nextInt(); d2 sc.nextInt() sc.nextInt sc if ( d1 == d2 ) {
				dd++;
				if(dd>=3) {
					System.out.println("Yes");
					System.exit(0);
				}
			}else{
				dd=0;
			} d1 == d2 d1 d2 {
				dd++;
				if(dd>=3) {
					System.out.println("Yes");
					System.exit(0);
				}
			} dd++ dd if(dd>=3) {
					System.out.println("Yes");
					System.exit(0);
				} dd>=3 dd 3 {
					System.out.println("Yes");
					System.exit(0);
				} System.out.println("Yes") System.out.println System.out System System.out "Yes" System.exit(0) System.exit System 0 {
				dd=0;
			} dd=0 dd 0 System.out.println("No") System.out.println System.out System System.out "No" String[] args args public class Main {
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		
		int dd = 0;
		for(int i=0; i<n;i++) {
			int d1 = sc.nextInt();
			int d2 = sc.nextInt();
			if ( d1 == d2 ) {
				dd++;
				if(dd>=3) {
					System.out.println("Yes");
					System.exit(0);
				}
			}else{
				dd=0;
			}
		}
		System.out.println("No");

	}
	
} public class Main {
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		
		int dd = 0;
		for(int i=0; i<n;i++) {
			int d1 = sc.nextInt();
			int d2 = sc.nextInt();
			if ( d1 == d2 ) {
				dd++;
				if(dd>=3) {
					System.out.println("Yes");
					System.exit(0);
				}
			}else{
				dd=0;
			}
		}
		System.out.println("No");

	}
	
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		
		int dd = 0;
		for(int i=0; i<n;i++) {
			int d1 = sc.nextInt();
			int d2 = sc.nextInt();
			if ( d1 == d2 ) {
				dd++;
				if(dd>=3) {
					System.out.println("Yes");
					System.exit(0);
				}
			}else{
				dd=0;
			}
		}
		System.out.println("No");

	}
	
}
