输出对应模式的星星*

n=int(input("请输入一个整数"))
n=n+1
m=n
for x in range(1,n):
    m=m-1
    print(" "*(m-1),end="")
    print("*"*(2*x-1))
m=0
for x in range(n-1,0,-1):
    m=m+1
    print(" "*(m-1),end="")
    print("*"*(2*x-1))