[백준] 10996번 : 별 찍기-21 - C#

https://www.acmicpc.net/problem/10996

using System;

class Program
{
    static void Main() {
        string arr=Console.ReadLine();
        int n=int.Parse(arr);
        int f=0;
        if(n==1) Console.Write("*");
        else{
        for(int i=1;i<=2*n;i++){
          for(int j=1;j<=n/2;j++){
              if(i%2==1&&n%2==0){
                  if(f==0){
                      Console.Write("*");
                      f++;
                  }
                  if(j<n/2) Console.Write(" *");
              }
              else if(i%2==1&&n%2==1){
                  if(f==0){
                      Console.Write("*");
                      f++;
                  }
                  Console.Write(" *");
              }
              else{
                  Console.Write(" *");
              }
              
          }
          f=0;
          Console.WriteLine();
      }
    }
        
    }
}