Leetcode Problem 679. 24 Game

679. 24 Game

Leetcode Solutions

Backtracking Approach to Solve Game

  1. Define a helper function generatePossibleResults(a, b) that returns all possible results of operations between two numbers a and b.
  2. Define the main recursive function checkIfResultReached(list) that tries to reach the result 24 using the current list of numbers.
    • If the list has only one number, check if it is approximately 24 and return the result.
    • Otherwise, for each pair of numbers in the list, perform all operations and recursively call checkIfResultReached with the updated list.
    • If the recursive call returns true, propagate the success; otherwise, backtrack.
  3. Start the algorithm by calling checkIfResultReached with the initial list of cards.
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