
import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.Set;
import java.util.StringTokenizer;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.InputStream;


public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        TaskT solver = new TaskT();
        solver.solve(1, in, out);
        out.close();
    }
    
    

    static class TaskT {
    	static int counter = 0;
        public void solve(int testNumber, InputReader in, PrintWriter out) {

        	int N = in.nextInt();
        	int cnt = 0; 
        	String ans = "";
        	for(int i = 0; i < N; i++){
        		int Di1 = in.nextInt();
        		int Di2 = in.nextInt();
        		
        		if(Di1 == Di2){
        			cnt ++;
        			if(cnt == 3)
        				ans = "Yes";
        				
        		}
        		else
        			cnt = 0;
        	}
        	
        	out.print(ans.length() == 0? "No": ans);
        }
        
     
        
        

    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }
        
        public long nextLong() {
            return Long.parseLong(next());
        }
    }
}
 import java.io.OutputStream; OutputStream java.io import java.io.IOException; IOException java.io import java.io.InputStream; InputStream java.io import java.io.PrintWriter; PrintWriter java.io import java.math.BigInteger; BigInteger java.math import java.util.ArrayList; ArrayList java.util import java.util.Arrays; Arrays java.util import java.util.HashMap; HashMap java.util import java.util.HashSet; HashSet java.util import java.util.List; List java.util import java.util.Map; Map java.util import java.util.Random; Random java.util import java.util.Set; Set java.util import java.util.StringTokenizer; StringTokenizer java.util import java.io.IOException; IOException java.io import java.io.BufferedReader; BufferedReader java.io import java.io.InputStreamReader; InputStreamReader java.io import java.io.InputStream; InputStream java.io public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        TaskT solver = new TaskT();
        solver.solve(1, in, out);
        out.close();
    }
    
    

    static class TaskT {
    	static int counter = 0;
        public void solve(int testNumber, InputReader in, PrintWriter out) {

        	int N = in.nextInt();
        	int cnt = 0; 
        	String ans = "";
        	for(int i = 0; i < N; i++){
        		int Di1 = in.nextInt();
        		int Di2 = in.nextInt();
        		
        		if(Di1 == Di2){
        			cnt ++;
        			if(cnt == 3)
        				ans = "Yes";
        				
        		}
        		else
        			cnt = 0;
        	}
        	
        	out.print(ans.length() == 0? "No": ans);
        }
        
     
        
        

    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }
        
        public long nextLong() {
            return Long.parseLong(next());
        }
    }
} Main public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        TaskT solver = new TaskT();
        solver.solve(1, in, out);
        out.close();
    } main {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        TaskT solver = new TaskT();
        solver.solve(1, in, out);
        out.close();
    } InputStream inputStream = System.in; inputStream System.in System System.in OutputStream outputStream = System.out; outputStream System.out System System.out InputReader in = new InputReader(inputStream); in new InputReader(inputStream) PrintWriter out = new PrintWriter(outputStream); out new PrintWriter(outputStream) TaskT solver = new TaskT(); solver new TaskT() solver.solve(1, in, out) solver.solve solver 1 in out out.close() out.close out String[] args args static class TaskT {
    	static int counter = 0;
        public void solve(int testNumber, InputReader in, PrintWriter out) {

        	int N = in.nextInt();
        	int cnt = 0; 
        	String ans = "";
        	for(int i = 0; i < N; i++){
        		int Di1 = in.nextInt();
        		int Di2 = in.nextInt();
        		
        		if(Di1 == Di2){
        			cnt ++;
        			if(cnt == 3)
        				ans = "Yes";
        				
        		}
        		else
        			cnt = 0;
        	}
        	
        	out.print(ans.length() == 0? "No": ans);
        }
        
     
        
        

    } TaskT static int counter = 0; counter 0 public void solve(int testNumber, InputReader in, PrintWriter out) {

        	int N = in.nextInt();
        	int cnt = 0; 
        	String ans = "";
        	for(int i = 0; i < N; i++){
        		int Di1 = in.nextInt();
        		int Di2 = in.nextInt();
        		
        		if(Di1 == Di2){
        			cnt ++;
        			if(cnt == 3)
        				ans = "Yes";
        				
        		}
        		else
        			cnt = 0;
        	}
        	
        	out.print(ans.length() == 0? "No": ans);
        } solve {

        	int N = in.nextInt();
        	int cnt = 0; 
        	String ans = "";
        	for(int i = 0; i < N; i++){
        		int Di1 = in.nextInt();
        		int Di2 = in.nextInt();
        		
        		if(Di1 == Di2){
        			cnt ++;
        			if(cnt == 3)
        				ans = "Yes";
        				
        		}
        		else
        			cnt = 0;
        	}
        	
        	out.print(ans.length() == 0? "No": ans);
        } int N = in.nextInt(); N in.nextInt() in.nextInt in int cnt = 0; cnt 0 String ans = ""; ans "" for(int i = 0; i < N; i++){
        		int Di1 = in.nextInt();
        		int Di2 = in.nextInt();
        		
        		if(Di1 == Di2){
        			cnt ++;
        			if(cnt == 3)
        				ans = "Yes";
        				
        		}
        		else
        			cnt = 0;
        	} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
        		int Di1 = in.nextInt();
        		int Di2 = in.nextInt();
        		
        		if(Di1 == Di2){
        			cnt ++;
        			if(cnt == 3)
        				ans = "Yes";
        				
        		}
        		else
        			cnt = 0;
        	} {
        		int Di1 = in.nextInt();
        		int Di2 = in.nextInt();
        		
        		if(Di1 == Di2){
        			cnt ++;
        			if(cnt == 3)
        				ans = "Yes";
        				
        		}
        		else
        			cnt = 0;
        	} int Di1 = in.nextInt(); Di1 in.nextInt() in.nextInt in int Di2 = in.nextInt(); Di2 in.nextInt() in.nextInt in if(Di1 == Di2){
        			cnt ++;
        			if(cnt == 3)
        				ans = "Yes";
        				
        		}
        		else
        			cnt = 0; Di1 == Di2 Di1 Di2 {
        			cnt ++;
        			if(cnt == 3)
        				ans = "Yes";
        				
        		} cnt ++ cnt if(cnt == 3)
        				ans = "Yes"; cnt == 3 cnt 3 ans = "Yes" ans "Yes" cnt = 0 cnt 0 out.print(ans.length() == 0? "No": ans) out.print out ans.length() == 0? "No": ans ans.length() == 0 ans.length() ans.length ans 0 "No" ans int testNumber testNumber InputReader in in PrintWriter out out static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }
        
        public long nextLong() {
            return Long.parseLong(next());
        }
    } InputReader public BufferedReader reader; reader public StringTokenizer tokenizer; tokenizer public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        } InputReader {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        } reader = new BufferedReader(new InputStreamReader(stream), 32768) reader new BufferedReader(new InputStreamReader(stream), 32768) tokenizer = null tokenizer null InputStream stream stream public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        } next {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        } while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            } tokenizer == null || !tokenizer.hasMoreTokens() tokenizer == null tokenizer null !tokenizer.hasMoreTokens() tokenizer.hasMoreTokens() tokenizer.hasMoreTokens tokenizer {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            } try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                } catch (IOException e) {
                    throw new RuntimeException(e);
                } IOException e {
                    throw new RuntimeException(e);
                } throw new RuntimeException(e); new RuntimeException(e) {
                    tokenizer = new StringTokenizer(reader.readLine());
                } tokenizer = new StringTokenizer(reader.readLine()) tokenizer new StringTokenizer(reader.readLine()) return tokenizer.nextToken(); tokenizer.nextToken() tokenizer.nextToken tokenizer public int nextInt() {
            return Integer.parseInt(next());
        } nextInt {
            return Integer.parseInt(next());
        } return Integer.parseInt(next()); Integer.parseInt(next()) Integer.parseInt Integer next() next public 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) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        TaskT solver = new TaskT();
        solver.solve(1, in, out);
        out.close();
    }
    
    

    static class TaskT {
    	static int counter = 0;
        public void solve(int testNumber, InputReader in, PrintWriter out) {

        	int N = in.nextInt();
        	int cnt = 0; 
        	String ans = "";
        	for(int i = 0; i < N; i++){
        		int Di1 = in.nextInt();
        		int Di2 = in.nextInt();
        		
        		if(Di1 == Di2){
        			cnt ++;
        			if(cnt == 3)
        				ans = "Yes";
        				
        		}
        		else
        			cnt = 0;
        	}
        	
        	out.print(ans.length() == 0? "No": ans);
        }
        
     
        
        

    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }
        
        public long nextLong() {
            return Long.parseLong(next());
        }
    }
} public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        TaskT solver = new TaskT();
        solver.solve(1, in, out);
        out.close();
    }
    
    

    static class TaskT {
    	static int counter = 0;
        public void solve(int testNumber, InputReader in, PrintWriter out) {

        	int N = in.nextInt();
        	int cnt = 0; 
        	String ans = "";
        	for(int i = 0; i < N; i++){
        		int Di1 = in.nextInt();
        		int Di2 = in.nextInt();
        		
        		if(Di1 == Di2){
        			cnt ++;
        			if(cnt == 3)
        				ans = "Yes";
        				
        		}
        		else
        			cnt = 0;
        	}
        	
        	out.print(ans.length() == 0? "No": ans);
        }
        
     
        
        

    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }
        
        public long nextLong() {
            return Long.parseLong(next());
        }
    }
} Main

import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.Set;
import java.util.StringTokenizer;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.InputStream;


public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        TaskT solver = new TaskT();
        solver.solve(1, in, out);
        out.close();
    }
    
    

    static class TaskT {
    	static int counter = 0;
        public void solve(int testNumber, InputReader in, PrintWriter out) {

        	int N = in.nextInt();
        	int cnt = 0; 
        	String ans = "";
        	for(int i = 0; i < N; i++){
        		int Di1 = in.nextInt();
        		int Di2 = in.nextInt();
        		
        		if(Di1 == Di2){
        			cnt ++;
        			if(cnt == 3)
        				ans = "Yes";
        				
        		}
        		else
        			cnt = 0;
        	}
        	
        	out.print(ans.length() == 0? "No": ans);
        }
        
     
        
        

    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }
        
        public long nextLong() {
            return Long.parseLong(next());
        }
    }
}

