Class Solution

  • All Implemented Interfaces:

    
    public final class Solution
    
                        

    292 - Nim Game.

    Easy

    You are playing the following Nim Game with your friend:

    • Initially, there is a heap of stones on the table.

    • You and your friend will alternate taking turns, and you go first.

    • On each turn, the person whose turn it is will remove 1 to 3 stones from the heap.

    • The one who removes the last stone is the winner.

    Given n, the number of stones in the heap, return true if you can win the game assuming both you and your friend play optimally, otherwise return false.

    Example 1:

    Input: n = 4

    Output: false

    Explanation: These are the possible outcomes: 1. You remove 1 stone. Your friend removes 3 stones, including the last stone. Your friend wins. 2. You remove 2 stones. Your friend removes 2 stones, including the last stone. Your friend wins. 3. You remove 3 stones. Your friend removes the last stone. Your friend wins. In all outcomes, your friend wins.

    Example 2:

    Input: n = 1

    Output: true

    Example 3:

    Input: n = 2

    Output: true

    Constraints:

    • <code>1 <= n <= 2<sup>31</sup> - 1</code>

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description
    • Field Summary

      Fields 
      Modifier and Type Field Description
    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()
    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description
    • Method Summary

      Modifier and Type Method Description
      final Boolean canWinNim(Integer n)
      • Methods inherited from class java.lang.Object

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