2439. Minimize Maximum of Array
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You are given a 0-indexed array nums comprising of n non-negative integers.
In one operation, you must:
- Choose an integer
isuch that1 <= i < nandnums[i] > 0. - Decrease
nums[i]by 1. - Increase
nums[i - 1]by 1.
Return the minimum possible value of the maximum integer of nums after performing any number of operations.
Example 1:
Input: nums = [3,7,1,6] Output: 5 Explanation: One set of optimal operations is as follows: 1. Choose i = 1, and nums becomes [4,6,1,6]. 2. Choose i = 3, and nums becomes [4,6,2,5]. 3. Choose i = 1, and nums becomes [5,5,2,5]. The maximum integer of nums is 5. It can be shown that the maximum number cannot be less than 5. Therefore, we return 5.
Example 2:
Input: nums = [10,1] Output: 10 Explanation: It is optimal to leave nums as is, and since 10 is the maximum value, we return 10.
Constraints:
n == nums.length2 <= n <= 1050 <= nums[i] <= 109
Hints
Hint 1
Try a binary search approach.
Hint 2
Perform a binary search over the minimum value that can be achieved for the maximum number of the array.
Hint 3
In each binary search iteration, iterate through the array backwards, greedily decreasing the current element until it is within the limit.