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 Object

1887 - Reduction Operations to Make the Array Elements Equal.<p>Medium</p> <p>Given an integer array <code>nums</code>, your goal is to make all elements in <code>nums</code> equal. To complete one operation, follow these steps:</p> <ol> <li>Find the <strong>largest</strong> value in <code>nums</code>. Let its index be <code>i</code> ( <strong>0-indexed</strong> ) and its value be <code>largest</code>. If there are multiple elements with the largest value, pick the smallest <code>i</code>.</li> <li>Find the <strong>next largest</strong> value in <code>nums</code> <strong>strictly smaller</strong> than <code>largest</code>. Let its value be <code>nextLargest</code>.</li> <li>Reduce <code>nums[i]</code> to <code>nextLargest</code>.</li> </ol> <p>Return <em>the number of operations to make all elements in</em> <code>nums</code> <em>equal</em>.</p> <p><strong>Example 1:</strong></p> <p><strong>Input:</strong> nums = [5,1,3]</p> <p><strong>Output:</strong> 3</p> <p><strong>Explanation:</strong> It takes 3 operations to make all elements in nums equal:</p> <ol> <li> <p>largest = 5 at index 0. nextLargest = 3. Reduce nums[0] to 3. nums = [3,1,3].</p> </li> <li> <p>largest = 3 at index 0. nextLargest = 1. Reduce nums[0] to 1. nums = [1,1,3].</p> </li> <li> <p>largest = 3 at index 2. nextLargest = 1. Reduce nums[2] to 1. nums = [1,1,1].</p> </li> </ol> <p><strong>Example 2:</strong></p> <p><strong>Input:</strong> nums = [1,1,1]</p> <p><strong>Output:</strong> 0</p> <p><strong>Explanation:</strong> All elements in nums are already equal.</p> <p><strong>Example 3:</strong></p> <p><strong>Input:</strong> nums = [1,1,2,2,3]</p> <p><strong>Output:</strong> 4</p> <p><strong>Explanation:</strong> It takes 4 operations to make all elements in nums equal:</p> <ol> <li> <p>largest = 3 at index 4. nextLargest = 2. Reduce nums[4] to 2. nums = [1,1,2,2,2].</p> </li> <li> <p>largest = 2 at index 2. nextLargest = 1. Reduce nums[2] to 1. nums = [1,1,1,2,2].</p> </li> <li> <p>largest = 2 at index 3. nextLargest = 1. Reduce nums[3] to 1. nums = [1,1,1,1,2].</p> </li> <li> <p>largest = 2 at index 4. nextLargest = 1. Reduce nums[4] to 1. nums = [1,1,1,1,1].</p> </li> </ol> <p><strong>Constraints:</strong></p> <ul> <li><code>1 <= nums.length <= 5 * 10⁴</code></li> <li><code>1 <= nums[i] <= 5 * 10⁴</code></li> </ul>

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)