import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int[][] arr = new int[n][2];
    for(int i=0;i<n;i++){
      arr[i][0]=sc.nextInt();
      arr[i][1]=sc.nextInt();
    }
    int max=0;
    int count=0;
    for(int i=0;i<n;i++){
      if(arr[i][1]==arr[i][0]){
        count++;
      }
      else{
        if(max<count){
          max=count;
        }
        count=0;
      }
    }
    if(max<count){
      max=count;
    }
    if(max>=3){
      System.out.println("Yes");
    }
    else{
      System.out.println("No");
    }
  }
} import java.util.*; util.* java public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int[][] arr = new int[n][2];
    for(int i=0;i<n;i++){
      arr[i][0]=sc.nextInt();
      arr[i][1]=sc.nextInt();
    }
    int max=0;
    int count=0;
    for(int i=0;i<n;i++){
      if(arr[i][1]==arr[i][0]){
        count++;
      }
      else{
        if(max<count){
          max=count;
        }
        count=0;
      }
    }
    if(max<count){
      max=count;
    }
    if(max>=3){
      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[][] arr = new int[n][2];
    for(int i=0;i<n;i++){
      arr[i][0]=sc.nextInt();
      arr[i][1]=sc.nextInt();
    }
    int max=0;
    int count=0;
    for(int i=0;i<n;i++){
      if(arr[i][1]==arr[i][0]){
        count++;
      }
      else{
        if(max<count){
          max=count;
        }
        count=0;
      }
    }
    if(max<count){
      max=count;
    }
    if(max>=3){
      System.out.println("Yes");
    }
    else{
      System.out.println("No");
    }
  } main {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int[][] arr = new int[n][2];
    for(int i=0;i<n;i++){
      arr[i][0]=sc.nextInt();
      arr[i][1]=sc.nextInt();
    }
    int max=0;
    int count=0;
    for(int i=0;i<n;i++){
      if(arr[i][1]==arr[i][0]){
        count++;
      }
      else{
        if(max<count){
          max=count;
        }
        count=0;
      }
    }
    if(max<count){
      max=count;
    }
    if(max>=3){
      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[][] arr = new int[n][2]; arr new int[n][2] n 2 for(int i=0;i<n;i++){
      arr[i][0]=sc.nextInt();
      arr[i][1]=sc.nextInt();
    } int i=0; int i=0; i 0 i<n i n i++ i++ i {
      arr[i][0]=sc.nextInt();
      arr[i][1]=sc.nextInt();
    } {
      arr[i][0]=sc.nextInt();
      arr[i][1]=sc.nextInt();
    } arr[i][0]=sc.nextInt() arr[i][0] arr[i] arr i 0 sc.nextInt() sc.nextInt sc arr[i][1]=sc.nextInt() arr[i][1] arr[i] arr i 1 sc.nextInt() sc.nextInt sc int max=0; max 0 int count=0; count 0 for(int i=0;i<n;i++){
      if(arr[i][1]==arr[i][0]){
        count++;
      }
      else{
        if(max<count){
          max=count;
        }
        count=0;
      }
    } int i=0; int i=0; i 0 i<n i n i++ i++ i {
      if(arr[i][1]==arr[i][0]){
        count++;
      }
      else{
        if(max<count){
          max=count;
        }
        count=0;
      }
    } {
      if(arr[i][1]==arr[i][0]){
        count++;
      }
      else{
        if(max<count){
          max=count;
        }
        count=0;
      }
    } if(arr[i][1]==arr[i][0]){
        count++;
      }
      else{
        if(max<count){
          max=count;
        }
        count=0;
      } arr[i][1]==arr[i][0] arr[i][1] arr[i] arr i 1 arr[i][0] arr[i] arr i 0 {
        count++;
      } count++ count {
        if(max<count){
          max=count;
        }
        count=0;
      } if(max<count){
          max=count;
        } max<count max count {
          max=count;
        } max=count max count count=0 count 0 if(max<count){
      max=count;
    } max<count max count {
      max=count;
    } max=count max count if(max>=3){
      System.out.println("Yes");
    }
    else{
      System.out.println("No");
    } max>=3 max 3 {
      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[][] arr = new int[n][2];
    for(int i=0;i<n;i++){
      arr[i][0]=sc.nextInt();
      arr[i][1]=sc.nextInt();
    }
    int max=0;
    int count=0;
    for(int i=0;i<n;i++){
      if(arr[i][1]==arr[i][0]){
        count++;
      }
      else{
        if(max<count){
          max=count;
        }
        count=0;
      }
    }
    if(max<count){
      max=count;
    }
    if(max>=3){
      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[][] arr = new int[n][2];
    for(int i=0;i<n;i++){
      arr[i][0]=sc.nextInt();
      arr[i][1]=sc.nextInt();
    }
    int max=0;
    int count=0;
    for(int i=0;i<n;i++){
      if(arr[i][1]==arr[i][0]){
        count++;
      }
      else{
        if(max<count){
          max=count;
        }
        count=0;
      }
    }
    if(max<count){
      max=count;
    }
    if(max>=3){
      System.out.println("Yes");
    }
    else{
      System.out.println("No");
    }
  }
} Main
import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int[][] arr = new int[n][2];
    for(int i=0;i<n;i++){
      arr[i][0]=sc.nextInt();
      arr[i][1]=sc.nextInt();
    }
    int max=0;
    int count=0;
    for(int i=0;i<n;i++){
      if(arr[i][1]==arr[i][0]){
        count++;
      }
      else{
        if(max<count){
          max=count;
        }
        count=0;
      }
    }
    if(max<count){
      max=count;
    }
    if(max>=3){
      System.out.println("Yes");
    }
    else{
      System.out.println("No");
    }
  }
}