문제 + 생각의 방향(Optional) + 코드 codility는 문제 저작권 문제로 문제는 복붙 불가... Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution, and you may not use the same element twice. Given a 32-bit signed integer, reverse digits of an integer. Assume we are dealing with an environment which could only sto..