import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int c = 0;
        
        for(int i = 0;i < n;i++){
                int d1 = sc.nextInt();
                int d2 = sc.nextInt();
                
                
                if(d1 == d2){
                    c++;
                }else{
                    c = 0;
                }
                
                if(c >= 3){
                    System.out.println("Yes");
                    return;
                }
        }
        
        
        System.out.println("No");
        
        
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int c = 0;
        
        for(int i = 0;i < n;i++){
                int d1 = sc.nextInt();
                int d2 = sc.nextInt();
                
                
                if(d1 == d2){
                    c++;
                }else{
                    c = 0;
                }
                
                if(c >= 3){
                    System.out.println("Yes");
                    return;
                }
        }
        
        
        System.out.println("No");
        
        
    }
} Main public static void main(String[] args) throws Exception {
        // Your code here!
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int c = 0;
        
        for(int i = 0;i < n;i++){
                int d1 = sc.nextInt();
                int d2 = sc.nextInt();
                
                
                if(d1 == d2){
                    c++;
                }else{
                    c = 0;
                }
                
                if(c >= 3){
                    System.out.println("Yes");
                    return;
                }
        }
        
        
        System.out.println("No");
        
        
    } main {
        // Your code here!
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int c = 0;
        
        for(int i = 0;i < n;i++){
                int d1 = sc.nextInt();
                int d2 = sc.nextInt();
                
                
                if(d1 == d2){
                    c++;
                }else{
                    c = 0;
                }
                
                if(c >= 3){
                    System.out.println("Yes");
                    return;
                }
        }
        
        
        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 c = 0; c 0 for(int i = 0;i < n;i++){
                int d1 = sc.nextInt();
                int d2 = sc.nextInt();
                
                
                if(d1 == d2){
                    c++;
                }else{
                    c = 0;
                }
                
                if(c >= 3){
                    System.out.println("Yes");
                    return;
                }
        } 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){
                    c++;
                }else{
                    c = 0;
                }
                
                if(c >= 3){
                    System.out.println("Yes");
                    return;
                }
        } {
                int d1 = sc.nextInt();
                int d2 = sc.nextInt();
                
                
                if(d1 == d2){
                    c++;
                }else{
                    c = 0;
                }
                
                if(c >= 3){
                    System.out.println("Yes");
                    return;
                }
        } int d1 = sc.nextInt(); d1 sc.nextInt() sc.nextInt sc int d2 = sc.nextInt(); d2 sc.nextInt() sc.nextInt sc if(d1 == d2){
                    c++;
                }else{
                    c = 0;
                } d1 == d2 d1 d2 {
                    c++;
                } c++ c {
                    c = 0;
                } c = 0 c 0 if(c >= 3){
                    System.out.println("Yes");
                    return;
                } c >= 3 c 3 {
                    System.out.println("Yes");
                    return;
                } System.out.println("Yes") System.out.println System.out System System.out "Yes" return; 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) throws Exception {
        // Your code here!
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int c = 0;
        
        for(int i = 0;i < n;i++){
                int d1 = sc.nextInt();
                int d2 = sc.nextInt();
                
                
                if(d1 == d2){
                    c++;
                }else{
                    c = 0;
                }
                
                if(c >= 3){
                    System.out.println("Yes");
                    return;
                }
        }
        
        
        System.out.println("No");
        
        
    }
} public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int c = 0;
        
        for(int i = 0;i < n;i++){
                int d1 = sc.nextInt();
                int d2 = sc.nextInt();
                
                
                if(d1 == d2){
                    c++;
                }else{
                    c = 0;
                }
                
                if(c >= 3){
                    System.out.println("Yes");
                    return;
                }
        }
        
        
        System.out.println("No");
        
        
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int c = 0;
        
        for(int i = 0;i < n;i++){
                int d1 = sc.nextInt();
                int d2 = sc.nextInt();
                
                
                if(d1 == d2){
                    c++;
                }else{
                    c = 0;
                }
                
                if(c >= 3){
                    System.out.println("Yes");
                    return;
                }
        }
        
        
        System.out.println("No");
        
        
    }
}
