Package g0301_0400.s0390_elimination_game

Class Solution

java.lang.Object

g0301_0400.s0390_elimination_game.Solution

public class Solution
extends Object

390 - Elimination Game.<p>Medium</p> <p>You have a list <code>arr</code> of all integers in the range <code>[1, n]</code> sorted in a strictly increasing order. Apply the following algorithm on <code>arr</code>:</p> <ul> <li>Starting from left to right, remove the first number and every other number afterward until you reach the end of the list.</li> <li>Repeat the previous step again, but this time from right to left, remove the rightmost number and every other number from the remaining numbers.</li> <li>Keep repeating the steps again, alternating left to right and right to left, until a single number remains.</li> </ul> <p>Given the integer <code>n</code>, return <em>the last number that remains in</em> <code>arr</code>.</p> <p><strong>Example 1:</strong></p> <p><strong>Input:</strong> n = 9</p> <p><strong>Output:</strong> 6</p> <p><strong>Explanation:</strong></p> <pre><code> arr = [1, 2, 3, 4, 5, 6, 7, 8, 9] arr = [2, 4, 6, 8] arr = [2, 6] arr = [6] </code></pre> <p><strong>Example 2:</strong></p> <p><strong>Input:</strong> n = 1</p> <p><strong>Output:</strong> 1</p> <p><strong>Constraints:</strong></p> <ul> <li><code>1 <= n <= 10⁹</code></li> </ul>

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int	lastRemaining(int n)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Solution

public Solution()

Method Details

lastRemaining

public int lastRemaining(int n)