Contains Duplicate Leetcode Easy Explained BtxJ93T3Wmg

Web Reference: Contains Duplicate - Given an integer array nums, return true if any value appears at least twice in the array, and return false if every element is distinct. Example 1: Input: nums = [1,2,3,1] Output: true Explanation: The element 1 occurs at the indices 0 and 3. In-depth solution and explanation for LeetCode 217. Contains Duplicate in Python, Java, C++ and more. Intuitions, example walk through, and complexity analysis. Better than official and forum solutions. If we sort the array, then any duplicate values will appear next to each other. Sorting groups identical elements together, so we can simply check adjacent positions to detect duplicates. This reduces the problem to a single linear scan after sorting, making it easy to identify if any value repeats. Algorithm Sort the array in non-decreasing order.

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