Given an integer R indicates number of row

Sample Input :
5
Sample Output :
    *
   * *
  *   *
 *     *
* * * * *



def pattern(n):
    for i in range(1, n+1):
        for j in range(n-i):
            print(' ', end = "")
        l=[]
        if i == 1:
            l.append('*')
        elif i == n:
            for j in range(n):
                l.append('*')
        else:
            l.append('*')
            for j in range(i-2):
                l.append(' ')
            l.append('*')
        print(" ".join(l))
        
n = int(input())
pattern(n)