import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[][] arr = new int[n][2];
        for(int i = 0; i < n; i++){
            arr[i][0] = sc.nextInt();
            arr[i][1] = sc.nextInt();
        }
        int count = 0;
        for(int i = 0; i < n; i++){
            if(arr[i][0] == arr[i][1]){
                count++;
            } else {
               count = 0;
            }
            if(count == 3){
                System.out.println("Yes");
                return;
            }
        }
        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[][] arr = new int[n][2];
        for(int i = 0; i < n; i++){
            arr[i][0] = sc.nextInt();
            arr[i][1] = sc.nextInt();
        }
        int count = 0;
        for(int i = 0; i < n; i++){
            if(arr[i][0] == arr[i][1]){
                count++;
            } else {
               count = 0;
            }
            if(count == 3){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");

    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[][] arr = new int[n][2];
        for(int i = 0; i < n; i++){
            arr[i][0] = sc.nextInt();
            arr[i][1] = sc.nextInt();
        }
        int count = 0;
        for(int i = 0; i < n; i++){
            if(arr[i][0] == arr[i][1]){
                count++;
            } else {
               count = 0;
            }
            if(count == 3){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");

    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[][] arr = new int[n][2];
        for(int i = 0; i < n; i++){
            arr[i][0] = sc.nextInt();
            arr[i][1] = sc.nextInt();
        }
        int count = 0;
        for(int i = 0; i < n; i++){
            if(arr[i][0] == arr[i][1]){
                count++;
            } else {
               count = 0;
            }
            if(count == 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[][] arr = new int[n][2]; arr new int[n][2] n 2 for(int i = 0; i < n; i++){
            arr[i][0] = sc.nextInt();
            arr[i][1] = sc.nextInt();
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            arr[i][0] = sc.nextInt();
            arr[i][1] = sc.nextInt();
        } {
            arr[i][0] = sc.nextInt();
            arr[i][1] = sc.nextInt();
        } arr[i][0] = sc.nextInt() arr[i][0] arr[i] arr i 0 sc.nextInt() sc.nextInt sc arr[i][1] = sc.nextInt() arr[i][1] arr[i] arr i 1 sc.nextInt() sc.nextInt sc int count = 0; count 0 for(int i = 0; i < n; i++){
            if(arr[i][0] == arr[i][1]){
                count++;
            } else {
               count = 0;
            }
            if(count == 3){
                System.out.println("Yes");
                return;
            }
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            if(arr[i][0] == arr[i][1]){
                count++;
            } else {
               count = 0;
            }
            if(count == 3){
                System.out.println("Yes");
                return;
            }
        } {
            if(arr[i][0] == arr[i][1]){
                count++;
            } else {
               count = 0;
            }
            if(count == 3){
                System.out.println("Yes");
                return;
            }
        } if(arr[i][0] == arr[i][1]){
                count++;
            } else {
               count = 0;
            } arr[i][0] == arr[i][1] arr[i][0] arr[i] arr i 0 arr[i][1] arr[i] arr i 1 {
                count++;
            } count++ count {
               count = 0;
            } count = 0 count 0 if(count == 3){
                System.out.println("Yes");
                return;
            } count == 3 count 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) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[][] arr = new int[n][2];
        for(int i = 0; i < n; i++){
            arr[i][0] = sc.nextInt();
            arr[i][1] = sc.nextInt();
        }
        int count = 0;
        for(int i = 0; i < n; i++){
            if(arr[i][0] == arr[i][1]){
                count++;
            } else {
               count = 0;
            }
            if(count == 3){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");

    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[][] arr = new int[n][2];
        for(int i = 0; i < n; i++){
            arr[i][0] = sc.nextInt();
            arr[i][1] = sc.nextInt();
        }
        int count = 0;
        for(int i = 0; i < n; i++){
            if(arr[i][0] == arr[i][1]){
                count++;
            } else {
               count = 0;
            }
            if(count == 3){
                System.out.println("Yes");
                return;
            }
        }
        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[][] arr = new int[n][2];
        for(int i = 0; i < n; i++){
            arr[i][0] = sc.nextInt();
            arr[i][1] = sc.nextInt();
        }
        int count = 0;
        for(int i = 0; i < n; i++){
            if(arr[i][0] == arr[i][1]){
                count++;
            } else {
               count = 0;
            }
            if(count == 3){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");

    }
}
