LeetCode 2856: Minimum Array Length After Pair Removals Solution
Master LeetCode problem 2856 (Minimum Array Length After Pair Removals), 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.
2856. Minimum Array Length After Pair Removals
Problem Explanation
Explanation:
To solve this problem, we can use a stack to keep track of the elements in the array. We iterate through the array, and for each element, we compare it with the top element of the stack. If the current element is greater than the top element, we can remove both elements as a pair since the array is sorted in non-decreasing order. If the current element is not greater than the top element, we push the current element onto the stack.
After processing all elements, the remaining elements in the stack represent the elements that cannot be removed in pairs. The size of the stack gives us the minimum length of the array after pair removals.
Time Complexity: O(n) where n is the number of elements in the input array nums. Space Complexity: O(n) where n is the number of elements in the input array nums.
:
Solution Code
class Solution {
public int minPairLength(int[] nums) {
Stack<Integer> stack = new Stack<>();
for (int num : nums) {
if (!stack.isEmpty() && num > stack.peek()) {
stack.pop();
} else {
stack.push(num);
}
}
return stack.size();
}
}Try It Yourself
Loading code editor...
Related LeetCode Problems
Frequently Asked Questions
How to solve LeetCode 2856 (Minimum Array Length After Pair Removals)?
This page provides optimized solutions for LeetCode problem 2856 (Minimum Array Length After Pair Removals) in Java, C++, and Python, along with a detailed explanation and an interactive code editor to test your code.
What is the time complexity of LeetCode 2856 (Minimum Array Length After Pair Removals)?
The time complexity for LeetCode 2856 (Minimum Array Length After Pair Removals) varies by solution. Check the detailed explanation section for specific complexities in Java, C++, and Python implementations.
Can I run code for LeetCode 2856 on DevExCode?
Yes, DevExCode provides an interactive code editor where you can write, test, and run your code for LeetCode 2856 in Java, C++, or Python.