python(题解）

n = int(input())
for i in range(1, n + 1):
print(' ' * (n - i), end='')
print('', end='')
if i > 1:
print(' ' * (2 * i - 3), end='')
print('', end='')
print()
for i in range(n - 1, 0, -1):
print(' ' * (n - i), end='')
print('', end='')
if i > 1:
print(' ' * (2 * i - 3), end='')
print('', end='')
print()