Problem

LeetCode 1929: Concatenation of Array

• NeetCode: https://neetcode.io/problems/concatenation-of-array?list=neetcode250

Solution

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class Solution:
    def getConcatenation(self, nums: list[int]) -> list[int]:
        return nums + nums

Explaination

This is simplest and easiest problem on neetcode. If you are looking an explaination for this one, you may need to revisit basics of your programming language of choice.

Also see

• Contains Duplicate
• Valid Anagram
• Two Sum
• Longest Common Prefix
• Group Anagrams
• Remove Element
• Majority Element
• Design HashSet
• Design HashMap
• Sort an Array
• Sort Colors
• Top K Frequent Elements
• Encode and Decode Strings
• Range Sum Query 2D Immutable
• Product of Array Except Self
• Valid Sudoku
• Longest Consecutive Sequence
• Best Time to Buy And Sell Stock II
• Majority Element II
• Subarray Sum Equals K
• First Missing Positive