Otherwise, any positive or negative integer may be used to rank productions. Now we can run.

否则，任何正整数或负整数都可以用来对结果排序。

youdao

Given a non-negative integer num, repeatedly add all its digits until the result has only one digit.

给定一个非负整数，将该整数的所有数字的和作为新的整数，重复直至得到只有一个数的整数。

youdao

In the second line, there is one non-negative integer which is the number of questions asked and answers to them.

第二行是一个不大于五千的非负整数，表示你提问的次数。

youdao