LeetCode 1060: Missing Element in Sorted Array Solution

Master LeetCode problem 1060 (Missing Element in Sorted Array), 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.

1060. Missing Element in Sorted Array

Medium

Array Binary Search

Problem Explanation

Explanation:

The problem asks to find the k-th missing number in a sorted array. We can solve this problem efficiently by iterating through the array and checking for each missing number until we find the k-th missing number.

Here is the step-by-step algorithm:

Initialize a variable missingCount to 0 to keep track of the number of missing elements.
Iterate through the array starting from the first element.
Check if the current element is equal to the next element minus 1. If it is not, increment missingCount.
If missingCount is equal to k, return the current element plus (k - missingCount).
Continue iterating until we find the k-th missing element.

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

Solution Code

class Solution {
    public int missingElement(int[] nums, int k) {
        int missingCount = 0;
        for (int i = 0; i < nums.length - 1; i++) {
            if (nums[i + 1] - nums[i] > 1) {
                missingCount += nums[i + 1] - nums[i] - 1;
            }
            if (missingCount >= k) {
                return nums[i] + k - (missingCount - (nums[i + 1] - nums[i] - 1));
            }
        }
        return nums[nums.length - 1] + k - missingCount;
    }
}

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