import java.util.*;

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

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