题解 | #圣诞树#

m=int(input())
n=3*m-2
if m==1:
    for i in range(1,n+3):
        print(' '*(n+2-i)+i*'* ')
    for i in range(m):
        print(' '*(3*m-1)+'*')
else:
    for i in range(1,n+3):
        if i in [3*i-2 for i in range(2,m+1)]:
            print(' '*(n+2-i)+(int((i+2)/3))*'*     ')
        elif i in [3*i-1 for i in range(2,m+1)]:
            print(' '*(n+2-i)+(int((i+1)/3))*'* *   ')
        else:
            print(' '*(n+2-i)+i*'* ')
    for i in range(m):
        print(' '*(3*m-1)+'*')