import java.util.*;
import java.io.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        int flag = 0;
        for(int i=0;i<n;i++){
            int d1 = sc.nextInt();
            int d2 = sc.nextInt();
            if(d1==d2){
                count++;
                if(count==3)flag=1;
            }else{
                count = 0;
            }
        }
        if(flag==1){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
} import java.util.*; util.* java import java.io.*; io.* java public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        int flag = 0;
        for(int i=0;i<n;i++){
            int d1 = sc.nextInt();
            int d2 = sc.nextInt();
            if(d1==d2){
                count++;
                if(count==3)flag=1;
            }else{
                count = 0;
            }
        }
        if(flag==1){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
} Main public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        int flag = 0;
        for(int i=0;i<n;i++){
            int d1 = sc.nextInt();
            int d2 = sc.nextInt();
            if(d1==d2){
                count++;
                if(count==3)flag=1;
            }else{
                count = 0;
            }
        }
        if(flag==1){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        int flag = 0;
        for(int i=0;i<n;i++){
            int d1 = sc.nextInt();
            int d2 = sc.nextInt();
            if(d1==d2){
                count++;
                if(count==3)flag=1;
            }else{
                count = 0;
            }
        }
        if(flag==1){
            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 count = 0; count 0 int flag = 0; flag 0 for(int i=0;i<n;i++){
            int d1 = sc.nextInt();
            int d2 = sc.nextInt();
            if(d1==d2){
                count++;
                if(count==3)flag=1;
            }else{
                count = 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){
                count++;
                if(count==3)flag=1;
            }else{
                count = 0;
            }
        } {
            int d1 = sc.nextInt();
            int d2 = sc.nextInt();
            if(d1==d2){
                count++;
                if(count==3)flag=1;
            }else{
                count = 0;
            }
        } int d1 = sc.nextInt(); d1 sc.nextInt() sc.nextInt sc int d2 = sc.nextInt(); d2 sc.nextInt() sc.nextInt sc if(d1==d2){
                count++;
                if(count==3)flag=1;
            }else{
                count = 0;
            } d1==d2 d1 d2 {
                count++;
                if(count==3)flag=1;
            } count++ count if(count==3)flag=1; count==3 count 3 flag=1 flag 1 {
                count = 0;
            } count = 0 count 0 if(flag==1){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        } flag==1 flag 1 {
            System.out.println("Yes");
        } System.out.println("Yes") System.out.println System.out System System.out "Yes" {
            System.out.println("No");
        } 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 {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        int flag = 0;
        for(int i=0;i<n;i++){
            int d1 = sc.nextInt();
            int d2 = sc.nextInt();
            if(d1==d2){
                count++;
                if(count==3)flag=1;
            }else{
                count = 0;
            }
        }
        if(flag==1){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
} public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        int flag = 0;
        for(int i=0;i<n;i++){
            int d1 = sc.nextInt();
            int d2 = sc.nextInt();
            if(d1==d2){
                count++;
                if(count==3)flag=1;
            }else{
                count = 0;
            }
        }
        if(flag==1){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
} Main
import java.util.*;
import java.io.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        int flag = 0;
        for(int i=0;i<n;i++){
            int d1 = sc.nextInt();
            int d2 = sc.nextInt();
            if(d1==d2){
                count++;
                if(count==3)flag=1;
            }else{
                count = 0;
            }
        }
        if(flag==1){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
}
