diamond2.py

while True:
    num = int(input())
    if num < 3 or num % 2 == 0: continue
        
    dot = 1
    blank = int(num / 2)
    
    while dot < num:
        print(' ' * blank + '*' * dot)
        dot += 2
        blank -= 1
        
    while dot > 0:
        print(' ' * blank + '*' * dot)
        dot -= 2
        blank += 1
        
    select = int(input())
    if select == 0: break