Leetcode Problem 2835. Minimum Operations to Form Subsequence With Target Sum

2835. Minimum Operations to Form Subsequence With Target Sum

Leetcode Solutions

Greedy Approach with Bit Manipulation

  1. Initialize a frequency array freq with a size large enough to hold all possible powers of 2.
  2. Populate freq with the count of each power of 2 present in nums.
  3. Initialize res to 0, which will hold the result.
  4. Loop over each bit of target from 0 to 31 (since target is an integer and has at most 32 bits).
  5. If the current bit is set in target, check if freq[i] is greater than 0.
  6. If freq[i] is greater than 0, decrement it by 1.
  7. If freq[i] is 0, find the next j where freq[j] is greater than 0, decrement freq[j] by 1, increment res by j-i, and increment freq[k] for all k from i to j-1.
  8. After processing the current bit, add half of freq[i] to freq[i+1].
  9. Continue this process until all bits are processed.
  10. Return res as the result.
UML Thumbnail

Greedy Approach with Sorting and Simulation

Ask Question

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

Suggested Answer

Answer
Full Screen
Copy Answer Code
Loading...