题解 | 23年OPPO-a的翻转

import sys

for line in sys.stdin:
    a_in = int(line)
    n = 0
    a_ini = 10 * [0]
    for i in range(10) :
        a_ini[9 - i] = a_in % 10
        a_in = (a_in - a_ini[9 - i]) // 10
        n += 1
        if a_in == 0 :
            break
    a = a_ini[10 - n : 10]
    b = n * [0]
    out = 0

    for i in range(n):
        b[i] = int(a[i]) + int(a[n - i - 1])
        out += b[i] * (10 ** (n-i-1))
    print(out)