Medium
Given an array nums of candy piles and an integer target (= k children), split piles (never merge) so every child gets the same number of candies from a single sub-pile. Return the maximum number of candies each child can get; return 0 if it is impossible to give every child at least one candy.
Input: nums = [5,8,6], target = 3 Output: 5
Input: nums = [2,5], target = 11 Output: 0