Leetcode Problem 2902. Count of Sub-Multisets With Bounded Sum

2902. Count of Sub-Multisets With Bounded Sum

Leetcode Solutions

Optimized Dynamic Programming

  1. Initialize a map to count the frequency of each element in nums.
  2. Create a DP array dp with size r + 1 and set dp[0] to 1.
  3. Iterate over each entry in the frequency map. a. Copy dp to a new array pSum for prefix sum processing. b. Update pSum by adding pSum[i - num] to pSum[i] for each i from num to r. c. Update dp using the prefix sums, considering the frequency of the current element.
  4. Calculate the result by summing up dp[i] for i from l to r.
  5. Return the result modulo 10^9 + 7.
UML Thumbnail

Knapsack DP with Sliding Window Optimization

Ask Question

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

Suggested Answer

Answer
Full Screen
Copy Answer Code
Loading...