题解 | #菱形图案#

while True:
    try:
        num = int(input())
        a, b = 0, num  # num不能变，创建两个变量
        for i in range(1, num*2+2):  # 实际应该输出num+1行
            if i > (num + 1):
                print(" " * (i - num - 1) + "* " * b)  # 后num行
                b -= 1
            else:
                print(" " * (num - a) + "* " * (a + 1))  # 前num+1行
                a += 1
    except:
        break