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