LeetCode 2348: Number of Zero-Filled Subarrays Solution

Master LeetCode problem 2348 (Number of Zero-Filled Subarrays), 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.

2348. Number of Zero-Filled Subarrays

Medium

Array Math

Problem Explanation

Explanation:

To solve this problem, we can iterate over the array and count the number of consecutive zeros in each subarray. We keep track of the count of zeros in the current subarray and calculate the number of zero-filled subarrays based on this count.

Initialize variables: countZeros to 0, result to 0.
Iterate over the array:
- If the current element is 0, increment countZeros.
- If the current element is not 0, calculate the number of zero-filled subarrays based on the count of zeros and update the result.
Return the final result.

Time complexity: O(N) where N is the number of elements in the input array. Space complexity: O(1)

Solution Code

class Solution {
    public int numOfSubarrays(int[] nums) {
        int countZeros = 0, result = 0;
        for (int num : nums) {
            if (num == 0) {
                countZeros++;
            } else {
                result += (countZeros * (countZeros + 1)) / 2;
                countZeros = 0;
            }
        }
        result += (countZeros * (countZeros + 1)) / 2;
        return result;
    }
}

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