题解 | #空心三角形图案#

#当成二维数组

while True:
    try:
        n = int(input())
        for i in range(1,n+1):
            for j in range(1,n+1):
                if i == j or j == 1 or i == n:
                    print('* ', end='')
                else:
                    print('  ', end=(''))
            print()
    except:
        break