Implement fun asteroidCollision(asteroids: IntArray): IntArray else if (Math.abs(prev) > Math. If there are no collisions, decrement the stack curIndex.Only decrement when curIndex is at the end of the stack. Given a collision with one AST with a larger value, remove the smaller AST.If the curIndex is not at the end of the stack after removing ASTs, continue to check for right-most collisions by decrementing curIndex. Given a collision with ASTs with equal value, remove both ASTs.A collision occurs when prev is positive and cur is negative. Using the current cur and previous prev values, check whether a collision will occur.Start curIndex at the top of the stack and check the stack until curIndex is at the second element of the stack, thus checking for all possible AST collisions. As elements are added to an ArrayList, its capacity grows automatically.Build ArrayList used as a stack and add the AST values to the stack.Use of this source code is governed by the Apache 2.0 license that can. However, I'm looking to improve speed and memory performance. and Kotlin Programming Language contributors. The solution performs as expected in terms of achieving the correct results. The 5 and 10 never collide.Ĭreate a stack using an ArrayList to compare asteroid (AST) direction, values, and remove ASTs. Specifically, when an element is added to an ArrayList, it is inserted into the array. To create an ArrayList in Kotlin, you can use the arrayListOf() function or the ArrayList constructor. It allows dynamic resizing of the list, and provides various methods for adding, removing, and manipulating elements in the list.
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