/* 参考《算法竞赛宝典一》,自己推的,可能还有通项公式,欢迎分享讨论 */
void print_sign( ){
int abs;
for( int col = -3; abs = ( col < 0 ? -col : col ), col <= 3; col ++,putchar(10) )
{
for( int blank = 0; blank <= abs; blank ++ )
putchar(' ');
for( int sign = 0; sign < 7-2*abs; sign ++ )
putchar('*');
}
}
// 负下标的概念,这个很有用
*
***
*****
*******
*********
*******
*****
***
*
'''
*
***
*****
*******
*****
***
*
'''
def main():
for i in range(-3,4):
# a = -i if i < 0 else i
a = [i,-i][i<0]
# 实际是[b,a][False],因为False被转换为0,所以是[1,2][0],也就是[1]
for j in range(7-2*a):
print('*',end='')
print('')
if __name__ == '__main__':
main()