LeetCode 2216: Minimum Deletions to Make Array Beautiful Solution

Master LeetCode problem 2216 (Minimum Deletions to Make Array Beautiful), a medium challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.

2216. Minimum Deletions to Make Array Beautiful

Medium

Array Stack Greedy

Problem Explanation

Explanation

To make the array beautiful, we need to ensure that the length is even and no adjacent elements are the same. We can achieve this by iterating through the array and counting the number of deletions needed to fix the violations of the beauty condition. We can then return the minimum number of deletions required.

Algorithm:

Initialize a variable deletions to 0.
Iterate through the array starting from the second element (index 1) and check if the current element is equal to the previous element. If it is, increment deletions.
After the loop, return deletions.

Time Complexity: O(n) where n is the length of the array. Space Complexity: O(1)

Solution Code

class Solution {
    public int minDeletions(int[] nums) {
        int deletions = 0;
        for (int i = 1; i < nums.length; i++) {
            if (nums[i] == nums[i - 1]) {
                deletions++;
            }
        }
        return deletions;
    }
}

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