题解 | 字符串反转

def rev_digits(n):
    n_str = str(n)
    nr_str = []
    m = len(n_str)
    for i in range(m):
        nr_str.append(n_str[m-i-1])
    return ''.join(nr_str)
n = input().strip()

print(rev_digits(n))