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Leetcode
  • Leetcode
  • Ruby
    • 1. Two Sum
    • 7. Reverse Integer
    • 9. Palindrome Number
    • 13. Roman to Integer
    • 14. Longest Common Prefix
    • 20. Valid Parentheses
    • 21. Merge Two Sorted Lists
    • 26. Remove Duplicates from Sorted Array
    • 27. Remove Element
    • 28. Implement strStr()
    • 35. Search Insert Position
    • 38. Count and Say
    • 53. Maximum Subarray
    • 58. Length of Last Word
    • 66. Plus One
    • 67. Add Binary
    • 69. Sqrt(x)
    • 70. Climbing Stairs
    • 83. Remove Duplicates from Sorted List
    • 88. Merge Sorted Array
    • 100. Same Tree
    • 101. Symmetric Tree
    • 104. Maximum Depth of Binary Tree
    • 121. Best Time to Buy and Sell Stock
    • 122. Best Time to Buy and Sell Stock II
    • 125. Valid Palindrome
    • 136. Single Number
    • 141. Linked List Cycle
    • 155. Min Stack
    • 160. Intersection of Two Linked Lists
    • 169. Majority Element
    • 191. Number of 1 Bits
    • 198. House Robber
    • 203. Remove Linked List Elements
    • 205. Isomorphic Strings
    • 206. Reverse Linked List
    • 217. Contains Duplicate
    • 226. Invert Binary Tree
    • 231. Power of Two
    • 234. Palindrome Linked List
    • 263. Ugly Number
    • 283. Move Zeroes
    • 292. Nim Game
    • 344. Reverse String
    • 350. Intersection of Two Arrays II
    • 371. Sum of Two Integers
    • 387. First Unique Character in a String
    • 404. Sum of Left Leaves
    • 401. Binary Watch
    • 448. Find All Numbers Disappeared in an Array
    • 922. Sort Array By Parity II
    • 1051. Height Checker
    • 1380. Lucky Numbers in a Matrix
  • C#
    • 1. Two Sum
    • 7. Reverse Integer
    • 9. Palindrome Number
    • 13. Roman to Integer
    • 14. Longest Common Prefix
    • 20. Valid Parentheses
    • 21. Merge Two Sorted Lists
    • 26. Remove Duplicates from Sorted Array
    • 27. Remove Element
    • 28. Implement strStr()
    • 35. Search Insert Position
    • 38. Count and Say
    • 53. Maximum Subarray
    • 58. Length of Last Word
    • 191. Number of 1 Bits
    • 231. Power of Two
    • 401. Binary Watch
    • 1114. Print in Order
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  1. Ruby

292. Nim Game

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:

  • 1 <= n <= 231 - 1

# @param {Integer} n
# @return {Boolean}
def can_win_nim(n)
  (n % 4) != 0
end
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Last updated 4 years ago

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