题解 | #菱形图案#

import sys

# 解题方法一
for line in sys.stdin:
    a = int(line)
    width = 2 * a + 3
    for i in range(1, a + 2):
        print("{:^{}}".format("* " * i, width))
    for i in range(a):
        print("{:^{}}".format("* " * (a - i), width))

# 解题方法二
for line in sys.stdin:
    a = int(line)
    for i in range(1, a + 2):
        print(" " * (a - i) + "* " * i)
    for i in range(1, a + 1):
        print(" " * i + "* " * (a - i))