import java.util.*;

public class Exercise29{
  public static void main (String[] args){

    Scanner sc = new Scanner(System.in);

    int size = sc.nextInt();
    String[] eto = new String[size];


    for (int n = 0; n < size; n++){
      eto[n] = sc.next();
    }
    int max = 0;
    for (int n = 0; n < size - 1; n++){
      int count = 1;
      for (int j = n + 1; j < size; j++){
        if (eto[n].equals(eto[j])){
          count++;
        }
      }

      max = Math.max(max, count);
    }

    boolean flag = true;

    if (size % 2 == 0){
      if (max > size / 2){
        flag = false;
      }
    }else{
      if (max > size / 2 + 1){
        flag = false;
      }
    }

    System.out.println(flag ? "YES" : "NO");
  }
}