https://www.acmicpc.net/problem/2446
n=int(input())
for i in range(n,0,-1):
for j in range(n-i): print(" ",end='')
for j in range((i-1)*2+1): print("*",end='')
print()
for i in range(2,n+1):
for j in range(n-i): print(" ",end='')
for j in range((i-1)*2+1): print("*",end='')
print()