Leetcode Problem 279. Perfect Squares

279. Perfect Squares

Leetcode Solutions

Dynamic Programming Approach

  1. Initialize a DP array dp of size n+1 with all elements set to n+1.
  2. Set dp[0] to 0 as the base case.
  3. Loop from 1 to n (inclusive) to fill the DP array: a. For each i from 1 to n, loop through all square numbers j*j where j*j <= i. b. Update dp[i] to be the minimum of dp[i] and dp[i - j*j] + 1.
  4. Return dp[n] as the result.
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Greedy + BFS (Breadth-First Search) Approach

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