indutivo.py

# -*- coding: utf-8 -*-

fat = [0]*1000001
fat[1] = 1

def ignorarZero(num):
    for I in reversed(str(num)):
        if I != '0':
            return int(I)

for I in range(2, 1000000):
    fat[I] = I*fat[I-1]
    fat[I] = fat[I]
    fat[I] = ignorarZero(fat[I])

#rodando
instancia = 1
while True:
    try:
        # print("Instancia {}".format(instancia))
        n = int(input())

        print(fat[n],end=",")
        instancia+=1

    except EOFError:
        print("",end="\n")
        break