import java.util.Scanner;


public class Main {

	public static void main(String[] args) {
	    Scanner sc = new Scanner(System.in);
	    int n = sc.nextInt();

	    boolean retflg = false;
	    int c = 0;
	    for (int i = 0; i < n; i++) {
	    	int d1 = sc.nextInt();
	    	int d2 = sc.nextInt();
	    	if (d1 == d2) {
	    		c++;
	    	} else {
	    		c = 0;
	    	}
	    	if (c >= 3) {
	    		retflg = true;
	    		break;
	    	}
	    }
	    if (retflg) {
	    	System.out.println("Yes");
	    } else {
	    	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();

	    boolean retflg = false;
	    int c = 0;
	    for (int i = 0; i < n; i++) {
	    	int d1 = sc.nextInt();
	    	int d2 = sc.nextInt();
	    	if (d1 == d2) {
	    		c++;
	    	} else {
	    		c = 0;
	    	}
	    	if (c >= 3) {
	    		retflg = true;
	    		break;
	    	}
	    }
	    if (retflg) {
	    	System.out.println("Yes");
	    } else {
	    	System.out.println("No");
	    }
	}

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

	    boolean retflg = false;
	    int c = 0;
	    for (int i = 0; i < n; i++) {
	    	int d1 = sc.nextInt();
	    	int d2 = sc.nextInt();
	    	if (d1 == d2) {
	    		c++;
	    	} else {
	    		c = 0;
	    	}
	    	if (c >= 3) {
	    		retflg = true;
	    		break;
	    	}
	    }
	    if (retflg) {
	    	System.out.println("Yes");
	    } else {
	    	System.out.println("No");
	    }
	} main {
	    Scanner sc = new Scanner(System.in);
	    int n = sc.nextInt();

	    boolean retflg = false;
	    int c = 0;
	    for (int i = 0; i < n; i++) {
	    	int d1 = sc.nextInt();
	    	int d2 = sc.nextInt();
	    	if (d1 == d2) {
	    		c++;
	    	} else {
	    		c = 0;
	    	}
	    	if (c >= 3) {
	    		retflg = true;
	    		break;
	    	}
	    }
	    if (retflg) {
	    	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 boolean retflg = false; retflg false int c = 0; c 0 for (int i = 0; i < n; i++) {
	    	int d1 = sc.nextInt();
	    	int d2 = sc.nextInt();
	    	if (d1 == d2) {
	    		c++;
	    	} else {
	    		c = 0;
	    	}
	    	if (c >= 3) {
	    		retflg = true;
	    		break;
	    	}
	    } 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) {
	    		c++;
	    	} else {
	    		c = 0;
	    	}
	    	if (c >= 3) {
	    		retflg = true;
	    		break;
	    	}
	    } {
	    	int d1 = sc.nextInt();
	    	int d2 = sc.nextInt();
	    	if (d1 == d2) {
	    		c++;
	    	} else {
	    		c = 0;
	    	}
	    	if (c >= 3) {
	    		retflg = true;
	    		break;
	    	}
	    } int d1 = sc.nextInt(); d1 sc.nextInt() sc.nextInt sc int d2 = sc.nextInt(); d2 sc.nextInt() sc.nextInt sc if (d1 == d2) {
	    		c++;
	    	} else {
	    		c = 0;
	    	} d1 == d2 d1 d2 {
	    		c++;
	    	} c++ c {
	    		c = 0;
	    	} c = 0 c 0 if (c >= 3) {
	    		retflg = true;
	    		break;
	    	} c >= 3 c 3 {
	    		retflg = true;
	    		break;
	    	} retflg = true retflg true break; if (retflg) {
	    	System.out.println("Yes");
	    } else {
	    	System.out.println("No");
	    } retflg {
	    	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) {
	    Scanner sc = new Scanner(System.in);
	    int n = sc.nextInt();

	    boolean retflg = false;
	    int c = 0;
	    for (int i = 0; i < n; i++) {
	    	int d1 = sc.nextInt();
	    	int d2 = sc.nextInt();
	    	if (d1 == d2) {
	    		c++;
	    	} else {
	    		c = 0;
	    	}
	    	if (c >= 3) {
	    		retflg = true;
	    		break;
	    	}
	    }
	    if (retflg) {
	    	System.out.println("Yes");
	    } else {
	    	System.out.println("No");
	    }
	}

} public class Main {

	public static void main(String[] args) {
	    Scanner sc = new Scanner(System.in);
	    int n = sc.nextInt();

	    boolean retflg = false;
	    int c = 0;
	    for (int i = 0; i < n; i++) {
	    	int d1 = sc.nextInt();
	    	int d2 = sc.nextInt();
	    	if (d1 == d2) {
	    		c++;
	    	} else {
	    		c = 0;
	    	}
	    	if (c >= 3) {
	    		retflg = true;
	    		break;
	    	}
	    }
	    if (retflg) {
	    	System.out.println("Yes");
	    } else {
	    	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();

	    boolean retflg = false;
	    int c = 0;
	    for (int i = 0; i < n; i++) {
	    	int d1 = sc.nextInt();
	    	int d2 = sc.nextInt();
	    	if (d1 == d2) {
	    		c++;
	    	} else {
	    		c = 0;
	    	}
	    	if (c >= 3) {
	    		retflg = true;
	    		break;
	    	}
	    }
	    if (retflg) {
	    	System.out.println("Yes");
	    } else {
	    	System.out.println("No");
	    }
	}

}