Leetcode Problem 216. Combination Sum III

216. Combination Sum III

Leetcode Solutions

Key approach of the solution: Backtracking

  1. Define a helper function that takes the current combination, the next number to consider, and the remaining sum.
  2. If the combination has k numbers and the remaining sum is 0, add the combination to the result.
  3. If the combination has fewer than k numbers, iterate over the possible next numbers from the current number to 9.
  4. For each number, if adding it to the current sum does not exceed n, add it to the current combination and recursively call the helper function with the updated parameters.
  5. After exploring with the current number, remove it from the combination to backtrack.
  6. Once all numbers are tried, return the result.
UML Thumbnail

Key approach of the solution: Iterative Combination Generation

Ask Question

Programming Language
image/screenshot of info(optional)
Full Screen
Loading...

Suggested Answer

Answer
Full Screen
Copy Answer Code
Loading...