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Concatenation of Array

Understand how to construct a new array by appending a given array to itself, a key technique in frequency analysis and coding patterns. This lesson guides you through problem understanding and implementation strategies to apply array concatenation effectively.

Statement

Given an integer array nums of length n, construct an array ans of length 2n2n such that ans[i] == nums[i] and ans[i + n] == nums[i] for 00 \leq ...