import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		
		int[][] d = new int[n][2];
		
		int count = 0;
		for(int i = 0; i < n; i++) {
			d[i][0] = sc.nextInt();
			d[i][1] = sc.nextInt();
			
			if(d[i][0] == d[i][1]) {
				count++;
			}else {
				count = 0;
			}
			
			if(count == 3) {
				System.out.println("Yes");
				break;
			}
			
		}
		
		if(count != 3) System.out.println("No");
		
		
		
		
	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		
		int[][] d = new int[n][2];
		
		int count = 0;
		for(int i = 0; i < n; i++) {
			d[i][0] = sc.nextInt();
			d[i][1] = sc.nextInt();
			
			if(d[i][0] == d[i][1]) {
				count++;
			}else {
				count = 0;
			}
			
			if(count == 3) {
				System.out.println("Yes");
				break;
			}
			
		}
		
		if(count != 3) System.out.println("No");
		
		
		
		
	}

} Main public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		
		int[][] d = new int[n][2];
		
		int count = 0;
		for(int i = 0; i < n; i++) {
			d[i][0] = sc.nextInt();
			d[i][1] = sc.nextInt();
			
			if(d[i][0] == d[i][1]) {
				count++;
			}else {
				count = 0;
			}
			
			if(count == 3) {
				System.out.println("Yes");
				break;
			}
			
		}
		
		if(count != 3) System.out.println("No");
		
		
		
		
	} main {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		
		int[][] d = new int[n][2];
		
		int count = 0;
		for(int i = 0; i < n; i++) {
			d[i][0] = sc.nextInt();
			d[i][1] = sc.nextInt();
			
			if(d[i][0] == d[i][1]) {
				count++;
			}else {
				count = 0;
			}
			
			if(count == 3) {
				System.out.println("Yes");
				break;
			}
			
		}
		
		if(count != 3) 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[][] d = new int[n][2]; d new int[n][2] n 2 int count = 0; count 0 for(int i = 0; i < n; i++) {
			d[i][0] = sc.nextInt();
			d[i][1] = sc.nextInt();
			
			if(d[i][0] == d[i][1]) {
				count++;
			}else {
				count = 0;
			}
			
			if(count == 3) {
				System.out.println("Yes");
				break;
			}
			
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			d[i][0] = sc.nextInt();
			d[i][1] = sc.nextInt();
			
			if(d[i][0] == d[i][1]) {
				count++;
			}else {
				count = 0;
			}
			
			if(count == 3) {
				System.out.println("Yes");
				break;
			}
			
		} {
			d[i][0] = sc.nextInt();
			d[i][1] = sc.nextInt();
			
			if(d[i][0] == d[i][1]) {
				count++;
			}else {
				count = 0;
			}
			
			if(count == 3) {
				System.out.println("Yes");
				break;
			}
			
		} d[i][0] = sc.nextInt() d[i][0] d[i] d i 0 sc.nextInt() sc.nextInt sc d[i][1] = sc.nextInt() d[i][1] d[i] d i 1 sc.nextInt() sc.nextInt sc if(d[i][0] == d[i][1]) {
				count++;
			}else {
				count = 0;
			} d[i][0] == d[i][1] d[i][0] d[i] d i 0 d[i][1] d[i] d i 1 {
				count++;
			} count++ count {
				count = 0;
			} count = 0 count 0 if(count == 3) {
				System.out.println("Yes");
				break;
			} count == 3 count 3 {
				System.out.println("Yes");
				break;
			} System.out.println("Yes") System.out.println System.out System System.out "Yes" break; if(count != 3) System.out.println("No"); count != 3 count 3 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) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		
		int[][] d = new int[n][2];
		
		int count = 0;
		for(int i = 0; i < n; i++) {
			d[i][0] = sc.nextInt();
			d[i][1] = sc.nextInt();
			
			if(d[i][0] == d[i][1]) {
				count++;
			}else {
				count = 0;
			}
			
			if(count == 3) {
				System.out.println("Yes");
				break;
			}
			
		}
		
		if(count != 3) System.out.println("No");
		
		
		
		
	}

} public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		
		int[][] d = new int[n][2];
		
		int count = 0;
		for(int i = 0; i < n; i++) {
			d[i][0] = sc.nextInt();
			d[i][1] = sc.nextInt();
			
			if(d[i][0] == d[i][1]) {
				count++;
			}else {
				count = 0;
			}
			
			if(count == 3) {
				System.out.println("Yes");
				break;
			}
			
		}
		
		if(count != 3) System.out.println("No");
		
		
		
		
	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		
		int[][] d = new int[n][2];
		
		int count = 0;
		for(int i = 0; i < n; i++) {
			d[i][0] = sc.nextInt();
			d[i][1] = sc.nextInt();
			
			if(d[i][0] == d[i][1]) {
				count++;
			}else {
				count = 0;
			}
			
			if(count == 3) {
				System.out.println("Yes");
				break;
			}
			
		}
		
		if(count != 3) System.out.println("No");
		
		
		
		
	}

}
