Instruction. Write a function, which takes a non-negative integer(seconds) as input and returns the time in a human readable format(HH:MM:SS) HH = hours, padded to 2 digits, range: 00- 99 MM = Minutes, padded to 2 digits, range: 00-59 SS = seconds, padded to 2 digits, range: 00-59 The maximum time never exceeds 359999(99:59:59) You can find some examples in the test fixtures. 음이 아닌 정수(초)를 입력받아 사..