LeetCode/cs/minimum-limit-of-balls-in-a-bag.cs

public class Solution {
    private int CeilDiv(int left, int right) {
        if (left % right != 0) {
            return 1 + left / right;
        }
        return left / right;
    }

    private bool IsPossible(int[] nums, int maxOperations, int maxBalls) {
        var performed = 0;

        foreach (var bag in nums) {
            var operations = CeilDiv(bag, maxBalls) - 1;
            performed += operations;

            if (performed > maxOperations) {
                return false;
            }
        }

        return true;
    }

    public int MinimumSize(int[] nums, int maxOperations) {
        int left = 1, right = nums.Max();

        while (left < right) {
            var middle = (left + right) / 2;

            if (IsPossible(nums, maxOperations, middle)) {
                right = middle;
            } else {
                left = middle + 1;
            }
        }

        return left;
    }
}