import java.util.Scanner;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);

    int n = sc.nextInt();

    int count = 0;
    boolean hit = false;
    for (int i = 0; i < n; i++) {
      int a = sc.nextInt();
      int b = sc.nextInt();

      if (a == b && hit) {
        count++;
      } else if (a == b) {
        hit = true;
        count++;
      } else {
        hit = false;
        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 count = 0;
    boolean hit = false;
    for (int i = 0; i < n; i++) {
      int a = sc.nextInt();
      int b = sc.nextInt();

      if (a == b && hit) {
        count++;
      } else if (a == b) {
        hit = true;
        count++;
      } else {
        hit = false;
        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 count = 0;
    boolean hit = false;
    for (int i = 0; i < n; i++) {
      int a = sc.nextInt();
      int b = sc.nextInt();

      if (a == b && hit) {
        count++;
      } else if (a == b) {
        hit = true;
        count++;
      } else {
        hit = false;
        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 count = 0;
    boolean hit = false;
    for (int i = 0; i < n; i++) {
      int a = sc.nextInt();
      int b = sc.nextInt();

      if (a == b && hit) {
        count++;
      } else if (a == b) {
        hit = true;
        count++;
      } else {
        hit = false;
        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 count = 0; count 0 boolean hit = false; hit false for (int i = 0; i < n; i++) {
      int a = sc.nextInt();
      int b = sc.nextInt();

      if (a == b && hit) {
        count++;
      } else if (a == b) {
        hit = true;
        count++;
      } else {
        hit = false;
        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 {
      int a = sc.nextInt();
      int b = sc.nextInt();

      if (a == b && hit) {
        count++;
      } else if (a == b) {
        hit = true;
        count++;
      } else {
        hit = false;
        count = 0;
      }

      if (count >= 3) {
        System.out.println("Yes");
        return;
      }
    } {
      int a = sc.nextInt();
      int b = sc.nextInt();

      if (a == b && hit) {
        count++;
      } else if (a == b) {
        hit = true;
        count++;
      } else {
        hit = false;
        count = 0;
      }

      if (count >= 3) {
        System.out.println("Yes");
        return;
      }
    } int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int b = sc.nextInt(); b sc.nextInt() sc.nextInt sc if (a == b && hit) {
        count++;
      } else if (a == b) {
        hit = true;
        count++;
      } else {
        hit = false;
        count = 0;
      } a == b && hit a == b a b hit {
        count++;
      } count++ count if (a == b) {
        hit = true;
        count++;
      } else {
        hit = false;
        count = 0;
      } a == b a b {
        hit = true;
        count++;
      } hit = true hit true count++ count {
        hit = false;
        count = 0;
      } hit = false hit false 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 count = 0;
    boolean hit = false;
    for (int i = 0; i < n; i++) {
      int a = sc.nextInt();
      int b = sc.nextInt();

      if (a == b && hit) {
        count++;
      } else if (a == b) {
        hit = true;
        count++;
      } else {
        hit = false;
        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 count = 0;
    boolean hit = false;
    for (int i = 0; i < n; i++) {
      int a = sc.nextInt();
      int b = sc.nextInt();

      if (a == b && hit) {
        count++;
      } else if (a == b) {
        hit = true;
        count++;
      } else {
        hit = false;
        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 count = 0;
    boolean hit = false;
    for (int i = 0; i < n; i++) {
      int a = sc.nextInt();
      int b = sc.nextInt();

      if (a == b && hit) {
        count++;
      } else if (a == b) {
        hit = true;
        count++;
      } else {
        hit = false;
        count = 0;
      }

      if (count >= 3) {
        System.out.println("Yes");
        return;
      }
    }

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