Package g1801_1900.s1887_reduction_operations_to_make_the_array_elements_equal

Class Solution

java.lang.Object
g1801_1900.s1887_reduction_operations_to_make_the_array_elements_equal.Solution
public class Solution extends java.lang.Object
1887 - Reduction Operations to Make the Array Elements Equal.

Medium

Given an integer array nums, your goal is to make all elements in nums equal. To complete one operation, follow these steps:

  1. Find the largest value in nums. Let its index be i ( 0-indexed ) and its value be largest. If there are multiple elements with the largest value, pick the smallest i.
  2. Find the next largest value in nums strictly smaller than largest. Let its value be nextLargest.
  3. Reduce nums[i] to nextLargest.

Return the number of operations to make all elements in nums equal.

Example 1:

Input: nums = [5,1,3]

Output: 3

Explanation: It takes 3 operations to make all elements in nums equal:

  1. largest = 5 at index 0. nextLargest = 3. Reduce nums[0] to 3. nums = [3,1,3].

  2. largest = 3 at index 0. nextLargest = 1. Reduce nums[0] to 1. nums = [1,1,3].

  3. largest = 3 at index 2. nextLargest = 1. Reduce nums[2] to 1. nums = [1,1,1].

Example 2:

Input: nums = [1,1,1]

Output: 0

Explanation: All elements in nums are already equal.

Example 3:

Input: nums = [1,1,2,2,3]

Output: 4

Explanation: It takes 4 operations to make all elements in nums equal:

  1. largest = 3 at index 4. nextLargest = 2. Reduce nums[4] to 2. nums = [1,1,2,2,2].

  2. largest = 2 at index 2. nextLargest = 1. Reduce nums[2] to 1. nums = [1,1,1,2,2].

  3. largest = 2 at index 3. nextLargest = 1. Reduce nums[3] to 1. nums = [1,1,1,1,2].

  4. largest = 2 at index 4. nextLargest = 1. Reduce nums[4] to 1. nums = [1,1,1,1,1].

Constraints:

  • 1 <= nums.length <= 5 * 104
  • 1 <= nums[i] <= 5 * 104

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    reductionOperations(int[] nums)
     

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • reductionOperations

      public int reductionOperations(int[] nums)