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 check = false;
    for (int i = 0; i < n; i++) {
      int d1 = sc.nextInt();
      int d2 = sc.nextInt();

      if (d1 == d2) {
        count++;
      } else {
        count = 0;
      }

      if (count > 2) {
        check = true;
      }
    }
    System.out.println(check ? "Yes" : "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 check = false;
    for (int i = 0; i < n; i++) {
      int d1 = sc.nextInt();
      int d2 = sc.nextInt();

      if (d1 == d2) {
        count++;
      } else {
        count = 0;
      }

      if (count > 2) {
        check = true;
      }
    }
    System.out.println(check ? "Yes" : "No");
  }
} Main public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();

    int count = 0;
    boolean check = false;
    for (int i = 0; i < n; i++) {
      int d1 = sc.nextInt();
      int d2 = sc.nextInt();

      if (d1 == d2) {
        count++;
      } else {
        count = 0;
      }

      if (count > 2) {
        check = true;
      }
    }
    System.out.println(check ? "Yes" : "No");
  } main {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();

    int count = 0;
    boolean check = false;
    for (int i = 0; i < n; i++) {
      int d1 = sc.nextInt();
      int d2 = sc.nextInt();

      if (d1 == d2) {
        count++;
      } else {
        count = 0;
      }

      if (count > 2) {
        check = true;
      }
    }
    System.out.println(check ? "Yes" : "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 check = false; check false for (int i = 0; i < n; i++) {
      int d1 = sc.nextInt();
      int d2 = sc.nextInt();

      if (d1 == d2) {
        count++;
      } else {
        count = 0;
      }

      if (count > 2) {
        check = true;
      }
    } 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++;
      } else {
        count = 0;
      }

      if (count > 2) {
        check = true;
      }
    } {
      int d1 = sc.nextInt();
      int d2 = sc.nextInt();

      if (d1 == d2) {
        count++;
      } else {
        count = 0;
      }

      if (count > 2) {
        check = true;
      }
    } int d1 = sc.nextInt(); d1 sc.nextInt() sc.nextInt sc int d2 = sc.nextInt(); d2 sc.nextInt() sc.nextInt sc if (d1 == d2) {
        count++;
      } else {
        count = 0;
      } d1 == d2 d1 d2 {
        count++;
      } count++ count {
        count = 0;
      } count = 0 count 0 if (count > 2) {
        check = true;
      } count > 2 count 2 {
        check = true;
      } check = true check true System.out.println(check ? "Yes" : "No") System.out.println System.out System System.out check ? "Yes" : "No" check "Yes" "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 check = false;
    for (int i = 0; i < n; i++) {
      int d1 = sc.nextInt();
      int d2 = sc.nextInt();

      if (d1 == d2) {
        count++;
      } else {
        count = 0;
      }

      if (count > 2) {
        check = true;
      }
    }
    System.out.println(check ? "Yes" : "No");
  }
} public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();

    int count = 0;
    boolean check = false;
    for (int i = 0; i < n; i++) {
      int d1 = sc.nextInt();
      int d2 = sc.nextInt();

      if (d1 == d2) {
        count++;
      } else {
        count = 0;
      }

      if (count > 2) {
        check = true;
      }
    }
    System.out.println(check ? "Yes" : "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 check = false;
    for (int i = 0; i < n; i++) {
      int d1 = sc.nextInt();
      int d2 = sc.nextInt();

      if (d1 == d2) {
        count++;
      } else {
        count = 0;
      }

      if (count > 2) {
        check = true;
      }
    }
    System.out.println(check ? "Yes" : "No");
  }
}
