	import java.util.Scanner;

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

			int n = sc.nextInt();
			int[][] d = new int[n][2];
			int count = 0;
			boolean ans=false;
			for(int i=0;i<n;i++) {
				d[i][0] = sc.nextInt();
				d[i][1] = sc.nextInt();
			}

			for(int i=0;i<n;i++) {

				if(d[i][0]==d[i][1]) {
					count++;
				}else {
					count=0;
				}if(count >= 3) {
					ans=true;}
			}
			if(ans) {
				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();
			int[][] d = new int[n][2];
			int count = 0;
			boolean ans=false;
			for(int i=0;i<n;i++) {
				d[i][0] = sc.nextInt();
				d[i][1] = sc.nextInt();
			}

			for(int i=0;i<n;i++) {

				if(d[i][0]==d[i][1]) {
					count++;
				}else {
					count=0;
				}if(count >= 3) {
					ans=true;}
			}
			if(ans) {
				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();
			int[][] d = new int[n][2];
			int count = 0;
			boolean ans=false;
			for(int i=0;i<n;i++) {
				d[i][0] = sc.nextInt();
				d[i][1] = sc.nextInt();
			}

			for(int i=0;i<n;i++) {

				if(d[i][0]==d[i][1]) {
					count++;
				}else {
					count=0;
				}if(count >= 3) {
					ans=true;}
			}
			if(ans) {
				System.out.println("Yes");
			}else {
				System.out.println("No");
			}


		} main {
			Scanner sc = new Scanner(System.in);

			int n = sc.nextInt();
			int[][] d = new int[n][2];
			int count = 0;
			boolean ans=false;
			for(int i=0;i<n;i++) {
				d[i][0] = sc.nextInt();
				d[i][1] = sc.nextInt();
			}

			for(int i=0;i<n;i++) {

				if(d[i][0]==d[i][1]) {
					count++;
				}else {
					count=0;
				}if(count >= 3) {
					ans=true;}
			}
			if(ans) {
				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 int[][] d = new int[n][2]; d new int[n][2] n 2 int count = 0; count 0 boolean ans=false; ans false for(int i=0;i<n;i++) {
				d[i][0] = sc.nextInt();
				d[i][1] = sc.nextInt();
			} int i=0; int i=0; i 0 i<n i n i++ i++ i {
				d[i][0] = sc.nextInt();
				d[i][1] = sc.nextInt();
			} {
				d[i][0] = sc.nextInt();
				d[i][1] = sc.nextInt();
			} d[i][0] = sc.nextInt() d[i][0] d[i] d i 0 sc.nextInt() sc.nextInt sc d[i][1] = sc.nextInt() d[i][1] d[i] d i 1 sc.nextInt() sc.nextInt sc for(int i=0;i<n;i++) {

				if(d[i][0]==d[i][1]) {
					count++;
				}else {
					count=0;
				}if(count >= 3) {
					ans=true;}
			} int i=0; int i=0; i 0 i<n i n i++ i++ i {

				if(d[i][0]==d[i][1]) {
					count++;
				}else {
					count=0;
				}if(count >= 3) {
					ans=true;}
			} {

				if(d[i][0]==d[i][1]) {
					count++;
				}else {
					count=0;
				}if(count >= 3) {
					ans=true;}
			} if(d[i][0]==d[i][1]) {
					count++;
				}else {
					count=0;
				} d[i][0]==d[i][1] d[i][0] d[i] d i 0 d[i][1] d[i] d i 1 {
					count++;
				} count++ count {
					count=0;
				} count=0 count 0 if(count >= 3) {
					ans=true;} count >= 3 count 3 {
					ans=true;} ans=true ans true if(ans) {
				System.out.println("Yes");
			}else {
				System.out.println("No");
			} ans {
				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();
			int[][] d = new int[n][2];
			int count = 0;
			boolean ans=false;
			for(int i=0;i<n;i++) {
				d[i][0] = sc.nextInt();
				d[i][1] = sc.nextInt();
			}

			for(int i=0;i<n;i++) {

				if(d[i][0]==d[i][1]) {
					count++;
				}else {
					count=0;
				}if(count >= 3) {
					ans=true;}
			}
			if(ans) {
				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();
			int[][] d = new int[n][2];
			int count = 0;
			boolean ans=false;
			for(int i=0;i<n;i++) {
				d[i][0] = sc.nextInt();
				d[i][1] = sc.nextInt();
			}

			for(int i=0;i<n;i++) {

				if(d[i][0]==d[i][1]) {
					count++;
				}else {
					count=0;
				}if(count >= 3) {
					ans=true;}
			}
			if(ans) {
				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();
			int[][] d = new int[n][2];
			int count = 0;
			boolean ans=false;
			for(int i=0;i<n;i++) {
				d[i][0] = sc.nextInt();
				d[i][1] = sc.nextInt();
			}

			for(int i=0;i<n;i++) {

				if(d[i][0]==d[i][1]) {
					count++;
				}else {
					count=0;
				}if(count >= 3) {
					ans=true;}
			}
			if(ans) {
				System.out.println("Yes");
			}else {
				System.out.println("No");
			}


		}
	}