Leetcode Problem 377. Combination Sum IV

377. Combination Sum IV

Leetcode Solutions

Bottom-Up Dynamic Programming

  1. Initialize a one-dimensional array dp of size target + 1 with all elements set to 0.
  2. Set dp[0] to 1, as there is one combination to reach the sum of 0 (no elements).
  3. Iterate over each i from 1 to target (inclusive). a. For each num in nums, if i - num is not negative, increment dp[i] by dp[i - num].
  4. Return dp[target] as the result, which represents the number of combinations to reach the target sum.
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Top-Down Dynamic Programming with Memoization

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