import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.math.BigInteger;
import java.util.*;
import java.util.Map.Entry;

public class Main {
	public static void main(String[] args) {
		FastScanner fs = new FastScanner();
	    int  n =fs.nextInt();
	    int count=0;
	    boolean present=false;
	    while(n-->0) {
	    	 int si=fs.nextInt();
	    	 int ei =fs.nextInt();
	    	 if(si==ei) {
	    		 count++;
	    	 }
	    	 if(count==3) {
	    		 present=true;
	    	 }
	    	 if(si!=ei) {
	    		 count=0;
	    	 }
	    }
	  if(present)System.out.println("Yes");
	  else System.out.println("No");
	}
	static void sort(int[] a) {
		ArrayList<Integer> l = new ArrayList<>();
		for(int i:a) l.add(i);
		Collections.sort(l);
		for(int i=0;i<l.size();i++) a[i]=l.get(i);
	}
	static class FastScanner {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st = new StringTokenizer("");
		String next() {
			while(!st.hasMoreTokens())
				try {
					st = new StringTokenizer(br.readLine());
				}catch(IOException e) {
					e.printStackTrace();
				}
			return st.nextToken();
		}
		int nextInt() {
			return Integer.parseInt(next());
		}
		int[] readArray(int n) {
			int[] a = new int[n];
			for(int i=0;i<n;i++)a[i]=nextInt();
			return a;
		}
		long nextLong() {
			return Long.parseLong(next());
		}
	}

} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io import java.math.BigInteger; BigInteger java.math import java.util.*; util.* java import java.util.Map.Entry; Entry java.util.Map public class Main {
	public static void main(String[] args) {
		FastScanner fs = new FastScanner();
	    int  n =fs.nextInt();
	    int count=0;
	    boolean present=false;
	    while(n-->0) {
	    	 int si=fs.nextInt();
	    	 int ei =fs.nextInt();
	    	 if(si==ei) {
	    		 count++;
	    	 }
	    	 if(count==3) {
	    		 present=true;
	    	 }
	    	 if(si!=ei) {
	    		 count=0;
	    	 }
	    }
	  if(present)System.out.println("Yes");
	  else System.out.println("No");
	}
	static void sort(int[] a) {
		ArrayList<Integer> l = new ArrayList<>();
		for(int i:a) l.add(i);
		Collections.sort(l);
		for(int i=0;i<l.size();i++) a[i]=l.get(i);
	}
	static class FastScanner {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st = new StringTokenizer("");
		String next() {
			while(!st.hasMoreTokens())
				try {
					st = new StringTokenizer(br.readLine());
				}catch(IOException e) {
					e.printStackTrace();
				}
			return st.nextToken();
		}
		int nextInt() {
			return Integer.parseInt(next());
		}
		int[] readArray(int n) {
			int[] a = new int[n];
			for(int i=0;i<n;i++)a[i]=nextInt();
			return a;
		}
		long nextLong() {
			return Long.parseLong(next());
		}
	}

} Main public static void main(String[] args) {
		FastScanner fs = new FastScanner();
	    int  n =fs.nextInt();
	    int count=0;
	    boolean present=false;
	    while(n-->0) {
	    	 int si=fs.nextInt();
	    	 int ei =fs.nextInt();
	    	 if(si==ei) {
	    		 count++;
	    	 }
	    	 if(count==3) {
	    		 present=true;
	    	 }
	    	 if(si!=ei) {
	    		 count=0;
	    	 }
	    }
	  if(present)System.out.println("Yes");
	  else System.out.println("No");
	} main {
		FastScanner fs = new FastScanner();
	    int  n =fs.nextInt();
	    int count=0;
	    boolean present=false;
	    while(n-->0) {
	    	 int si=fs.nextInt();
	    	 int ei =fs.nextInt();
	    	 if(si==ei) {
	    		 count++;
	    	 }
	    	 if(count==3) {
	    		 present=true;
	    	 }
	    	 if(si!=ei) {
	    		 count=0;
	    	 }
	    }
	  if(present)System.out.println("Yes");
	  else System.out.println("No");
	} FastScanner fs = new FastScanner(); fs new FastScanner() int  n =fs.nextInt(); n fs.nextInt() fs.nextInt fs int count=0; count 0 boolean present=false; present false while(n-->0) {
	    	 int si=fs.nextInt();
	    	 int ei =fs.nextInt();
	    	 if(si==ei) {
	    		 count++;
	    	 }
	    	 if(count==3) {
	    		 present=true;
	    	 }
	    	 if(si!=ei) {
	    		 count=0;
	    	 }
	    } n-->0 n-- n 0 {
	    	 int si=fs.nextInt();
	    	 int ei =fs.nextInt();
	    	 if(si==ei) {
	    		 count++;
	    	 }
	    	 if(count==3) {
	    		 present=true;
	    	 }
	    	 if(si!=ei) {
	    		 count=0;
	    	 }
	    } int si=fs.nextInt(); si fs.nextInt() fs.nextInt fs int ei =fs.nextInt(); ei fs.nextInt() fs.nextInt fs if(si==ei) {
	    		 count++;
	    	 } si==ei si ei {
	    		 count++;
	    	 } count++ count if(count==3) {
	    		 present=true;
	    	 } count==3 count 3 {
	    		 present=true;
	    	 } present=true present true if(si!=ei) {
	    		 count=0;
	    	 } si!=ei si ei {
	    		 count=0;
	    	 } count=0 count 0 if(present)System.out.println("Yes");
	  else System.out.println("No"); present System.out.println("Yes") System.out.println System.out System System.out "Yes" System.out.println("No") System.out.println System.out System System.out "No" String[] args args static void sort(int[] a) {
		ArrayList<Integer> l = new ArrayList<>();
		for(int i:a) l.add(i);
		Collections.sort(l);
		for(int i=0;i<l.size();i++) a[i]=l.get(i);
	} sort {
		ArrayList<Integer> l = new ArrayList<>();
		for(int i:a) l.add(i);
		Collections.sort(l);
		for(int i=0;i<l.size();i++) a[i]=l.get(i);
	} ArrayList<Integer> l = new ArrayList<>(); l new ArrayList<>() for(int i:a) l.add(i); int i a l.add(i); l.add(i) l.add l i Collections.sort(l) Collections.sort Collections l for(int i=0;i<l.size();i++) a[i]=l.get(i); int i=0; int i=0; i 0 i<l.size() i l.size() l.size l i++ i++ i a[i]=l.get(i); a[i]=l.get(i) a[i] a i l.get(i) l.get l i int[] a a static class FastScanner {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st = new StringTokenizer("");
		String next() {
			while(!st.hasMoreTokens())
				try {
					st = new StringTokenizer(br.readLine());
				}catch(IOException e) {
					e.printStackTrace();
				}
			return st.nextToken();
		}
		int nextInt() {
			return Integer.parseInt(next());
		}
		int[] readArray(int n) {
			int[] a = new int[n];
			for(int i=0;i<n;i++)a[i]=nextInt();
			return a;
		}
		long nextLong() {
			return Long.parseLong(next());
		}
	} FastScanner BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) StringTokenizer st = new StringTokenizer(""); st new StringTokenizer("") String next() {
			while(!st.hasMoreTokens())
				try {
					st = new StringTokenizer(br.readLine());
				}catch(IOException e) {
					e.printStackTrace();
				}
			return st.nextToken();
		} next {
			while(!st.hasMoreTokens())
				try {
					st = new StringTokenizer(br.readLine());
				}catch(IOException e) {
					e.printStackTrace();
				}
			return st.nextToken();
		} while(!st.hasMoreTokens())
				try {
					st = new StringTokenizer(br.readLine());
				}catch(IOException e) {
					e.printStackTrace();
				} !st.hasMoreTokens() st.hasMoreTokens() st.hasMoreTokens st try {
					st = new StringTokenizer(br.readLine());
				}catch(IOException e) {
					e.printStackTrace();
				} catch(IOException e) {
					e.printStackTrace();
				} IOException e {
					e.printStackTrace();
				} e.printStackTrace() e.printStackTrace e {
					st = new StringTokenizer(br.readLine());
				} st = new StringTokenizer(br.readLine()) st new StringTokenizer(br.readLine()) return st.nextToken(); st.nextToken() st.nextToken st int nextInt() {
			return Integer.parseInt(next());
		} nextInt {
			return Integer.parseInt(next());
		} return Integer.parseInt(next()); Integer.parseInt(next()) Integer.parseInt Integer next() next int[] readArray(int n) {
			int[] a = new int[n];
			for(int i=0;i<n;i++)a[i]=nextInt();
			return a;
		} readArray {
			int[] a = new int[n];
			for(int i=0;i<n;i++)a[i]=nextInt();
			return a;
		} int[] a = new int[n]; a new int[n] n for(int i=0;i<n;i++)a[i]=nextInt(); int i=0; int i=0; i 0 i<n i n i++ i++ i a[i]=nextInt(); a[i]=nextInt() a[i] a i nextInt() nextInt return a; a int n n long nextLong() {
			return Long.parseLong(next());
		} nextLong {
			return Long.parseLong(next());
		} return Long.parseLong(next()); Long.parseLong(next()) Long.parseLong Long next() next public class Main {
	public static void main(String[] args) {
		FastScanner fs = new FastScanner();
	    int  n =fs.nextInt();
	    int count=0;
	    boolean present=false;
	    while(n-->0) {
	    	 int si=fs.nextInt();
	    	 int ei =fs.nextInt();
	    	 if(si==ei) {
	    		 count++;
	    	 }
	    	 if(count==3) {
	    		 present=true;
	    	 }
	    	 if(si!=ei) {
	    		 count=0;
	    	 }
	    }
	  if(present)System.out.println("Yes");
	  else System.out.println("No");
	}
	static void sort(int[] a) {
		ArrayList<Integer> l = new ArrayList<>();
		for(int i:a) l.add(i);
		Collections.sort(l);
		for(int i=0;i<l.size();i++) a[i]=l.get(i);
	}
	static class FastScanner {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st = new StringTokenizer("");
		String next() {
			while(!st.hasMoreTokens())
				try {
					st = new StringTokenizer(br.readLine());
				}catch(IOException e) {
					e.printStackTrace();
				}
			return st.nextToken();
		}
		int nextInt() {
			return Integer.parseInt(next());
		}
		int[] readArray(int n) {
			int[] a = new int[n];
			for(int i=0;i<n;i++)a[i]=nextInt();
			return a;
		}
		long nextLong() {
			return Long.parseLong(next());
		}
	}

} public class Main {
	public static void main(String[] args) {
		FastScanner fs = new FastScanner();
	    int  n =fs.nextInt();
	    int count=0;
	    boolean present=false;
	    while(n-->0) {
	    	 int si=fs.nextInt();
	    	 int ei =fs.nextInt();
	    	 if(si==ei) {
	    		 count++;
	    	 }
	    	 if(count==3) {
	    		 present=true;
	    	 }
	    	 if(si!=ei) {
	    		 count=0;
	    	 }
	    }
	  if(present)System.out.println("Yes");
	  else System.out.println("No");
	}
	static void sort(int[] a) {
		ArrayList<Integer> l = new ArrayList<>();
		for(int i:a) l.add(i);
		Collections.sort(l);
		for(int i=0;i<l.size();i++) a[i]=l.get(i);
	}
	static class FastScanner {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st = new StringTokenizer("");
		String next() {
			while(!st.hasMoreTokens())
				try {
					st = new StringTokenizer(br.readLine());
				}catch(IOException e) {
					e.printStackTrace();
				}
			return st.nextToken();
		}
		int nextInt() {
			return Integer.parseInt(next());
		}
		int[] readArray(int n) {
			int[] a = new int[n];
			for(int i=0;i<n;i++)a[i]=nextInt();
			return a;
		}
		long nextLong() {
			return Long.parseLong(next());
		}
	}

} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.math.BigInteger;
import java.util.*;
import java.util.Map.Entry;

public class Main {
	public static void main(String[] args) {
		FastScanner fs = new FastScanner();
	    int  n =fs.nextInt();
	    int count=0;
	    boolean present=false;
	    while(n-->0) {
	    	 int si=fs.nextInt();
	    	 int ei =fs.nextInt();
	    	 if(si==ei) {
	    		 count++;
	    	 }
	    	 if(count==3) {
	    		 present=true;
	    	 }
	    	 if(si!=ei) {
	    		 count=0;
	    	 }
	    }
	  if(present)System.out.println("Yes");
	  else System.out.println("No");
	}
	static void sort(int[] a) {
		ArrayList<Integer> l = new ArrayList<>();
		for(int i:a) l.add(i);
		Collections.sort(l);
		for(int i=0;i<l.size();i++) a[i]=l.get(i);
	}
	static class FastScanner {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st = new StringTokenizer("");
		String next() {
			while(!st.hasMoreTokens())
				try {
					st = new StringTokenizer(br.readLine());
				}catch(IOException e) {
					e.printStackTrace();
				}
			return st.nextToken();
		}
		int nextInt() {
			return Integer.parseInt(next());
		}
		int[] readArray(int n) {
			int[] a = new int[n];
			for(int i=0;i<n;i++)a[i]=nextInt();
			return a;
		}
		long nextLong() {
			return Long.parseLong(next());
		}
	}

}
