Web Reference: Sometimes it's better to use dynamic size arrays. Java's Arraylist can provide you this feature. 317 efficient solutions to HackerRank problems. Contribute to RodneyShag/HackerRank_solutions development by creating an account on GitHub. Try to solve this problem using Arraylist. You are given n lines. In each line there are zero or more integers. You need to answer a few queries where you need to tell the number located in yth position of xth line. Take your input from System.in. The first line has an integer n.
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