Web Reference: Learn to use dynamic arrays by solving this problem. Mar 18, 2025 · In this post, we will solve the Dynamic Array Problem in HackerRank. Declare a 2-dimensional array, arr, with n empty arrays, all zero-indexed. Declare an integer, last Answer, and initialize it to 0. You need to process two types of queries: Query: 1 x y Compute idx = (xlast Answer). Append the integer y to arr [idx]. Query: 2 x y # Learn to use dynamic arrays by solving this problem. While the code is focused, press Alt+F1 for a menu of operations. HackerRank personal solutions. Contribute to rene-d/hackerrank development by creating an account on GitHub.
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