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24 Game

hard Solve on LeetCode

Last edited: October 11, 2025

Problem
Examples
Example 1
Example 2
Constraints
Follow up
Solution
Method 1 – Backtracking
Intuition
Approach
Code
Complexity
Follow up Solution - Generalizing to n numbers
Method 1 - Backtracking
Method 2 - Pairwise DFS + Memoization
Intuition
Approach
Code
Complexity
Complexity
Method 3 - Subset DP (DP over subsets)
Intuition
Approach
Code
Complexity

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backtracking leetcode math

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