LeetCode 2334: Subarray With Elements Greater Than Varying Threshold Solution

Master LeetCode problem 2334 (Subarray With Elements Greater Than Varying Threshold), a hard 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.

2334. Subarray With Elements Greater Than Varying Threshold

Hard

Array Stack Union Find Monotonic Stack

Problem Explanation

Explanation

To solve this problem, we can use a sliding window approach. We start by initializing a window of size k and calculate the sum of elements within this window. We then slide the window to the right, updating the sum by removing the leftmost element and adding the rightmost element. At each step, we check if every element in the current window is greater than threshold / k. If so, we update the result with the size of the current window. We continue this process until we have checked all possible subarrays.

Time Complexity: O(N) Space Complexity: O(1)

Solution Code

class Solution {
    public int subarraySize(int[] nums, int threshold) {
        int n = nums.length;
        int sum = 0;
        int k = 1;
        int result = -1;
        
        for (int i = 0; i < n; i++) {
            sum += nums[i];
            if (i >= k) {
                sum -= nums[i - k];
            }
            if (i >= k - 1 && sum >= threshold) {
                result = k;
                break;
            }
            k++;
        }
        
        return result;
    }
}

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