打印等腰三角形
'''
* 1 3 1
*** 2 2 3
***** 3 1 5
******* 4 0 7
'''
a = int(input("输入行数:"))
for i in range(0,a+1):
#空格数
space = a - i
for j in range(space,0,-1):
print(" ",end="")
#星数
star = 2 * i - 1
for k in range(0,star):
print("*",end="")
#换行
print()