符合要求的代码怎样编写？

innumber = input()
outnunmer = ""
sum = 0
for i in range(len(innumber)):
    if i % 2 == 0:
        sum += int(innumber[i])
    else:
        sum += 3*int(innumber[i])
outnunmer=innumber+str(10-sum%10)
print(outnunmer)