import java.util.Scanner;

public class Main {


    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();

        int[][] info = new int[N][2];

        for (int i = 0; i < N; i++) {
            info[i][0] = sc.nextInt();
            info[i][1] = sc.nextInt();
        }

        int z = 0;
        for (int i = 0; i < N; i++) {

            if (info[i][0] == info[i][1]) {
                z++;
            } else {
                z = 0;
            }

            if (z == 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[][] info = new int[N][2];

        for (int i = 0; i < N; i++) {
            info[i][0] = sc.nextInt();
            info[i][1] = sc.nextInt();
        }

        int z = 0;
        for (int i = 0; i < N; i++) {

            if (info[i][0] == info[i][1]) {
                z++;
            } else {
                z = 0;
            }

            if (z == 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[][] info = new int[N][2];

        for (int i = 0; i < N; i++) {
            info[i][0] = sc.nextInt();
            info[i][1] = sc.nextInt();
        }

        int z = 0;
        for (int i = 0; i < N; i++) {

            if (info[i][0] == info[i][1]) {
                z++;
            } else {
                z = 0;
            }

            if (z == 3) {
                System.out.println("Yes");
                return;

            }
        }
        System.out.println("No");
    } main {

        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();

        int[][] info = new int[N][2];

        for (int i = 0; i < N; i++) {
            info[i][0] = sc.nextInt();
            info[i][1] = sc.nextInt();
        }

        int z = 0;
        for (int i = 0; i < N; i++) {

            if (info[i][0] == info[i][1]) {
                z++;
            } else {
                z = 0;
            }

            if (z == 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[][] info = new int[N][2]; info new int[N][2] N 2 for (int i = 0; i < N; i++) {
            info[i][0] = sc.nextInt();
            info[i][1] = sc.nextInt();
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            info[i][0] = sc.nextInt();
            info[i][1] = sc.nextInt();
        } {
            info[i][0] = sc.nextInt();
            info[i][1] = sc.nextInt();
        } info[i][0] = sc.nextInt() info[i][0] info[i] info i 0 sc.nextInt() sc.nextInt sc info[i][1] = sc.nextInt() info[i][1] info[i] info i 1 sc.nextInt() sc.nextInt sc int z = 0; z 0 for (int i = 0; i < N; i++) {

            if (info[i][0] == info[i][1]) {
                z++;
            } else {
                z = 0;
            }

            if (z == 3) {
                System.out.println("Yes");
                return;

            }
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {

            if (info[i][0] == info[i][1]) {
                z++;
            } else {
                z = 0;
            }

            if (z == 3) {
                System.out.println("Yes");
                return;

            }
        } {

            if (info[i][0] == info[i][1]) {
                z++;
            } else {
                z = 0;
            }

            if (z == 3) {
                System.out.println("Yes");
                return;

            }
        } if (info[i][0] == info[i][1]) {
                z++;
            } else {
                z = 0;
            } info[i][0] == info[i][1] info[i][0] info[i] info i 0 info[i][1] info[i] info i 1 {
                z++;
            } z++ z {
                z = 0;
            } z = 0 z 0 if (z == 3) {
                System.out.println("Yes");
                return;

            } z == 3 z 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[][] info = new int[N][2];

        for (int i = 0; i < N; i++) {
            info[i][0] = sc.nextInt();
            info[i][1] = sc.nextInt();
        }

        int z = 0;
        for (int i = 0; i < N; i++) {

            if (info[i][0] == info[i][1]) {
                z++;
            } else {
                z = 0;
            }

            if (z == 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[][] info = new int[N][2];

        for (int i = 0; i < N; i++) {
            info[i][0] = sc.nextInt();
            info[i][1] = sc.nextInt();
        }

        int z = 0;
        for (int i = 0; i < N; i++) {

            if (info[i][0] == info[i][1]) {
                z++;
            } else {
                z = 0;
            }

            if (z == 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[][] info = new int[N][2];

        for (int i = 0; i < N; i++) {
            info[i][0] = sc.nextInt();
            info[i][1] = sc.nextInt();
        }

        int z = 0;
        for (int i = 0; i < N; i++) {

            if (info[i][0] == info[i][1]) {
                z++;
            } else {
                z = 0;
            }

            if (z == 3) {
                System.out.println("Yes");
                return;

            }
        }
        System.out.println("No");
    }
}