写法1就可以过，写法2一个没过

1. 写法1

n = float(input())
m = list(str(n))
for i in range(len(m), 0, -1):
    print(m[i-1], end='')

2. 写法2

n = input()

for i in range(len(n), 0, -1):
    print(n[i-1], end='')