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Leetcode Problem 338. Counting Bits

338. Counting Bits

Leetcode Solutions

DP + Least Significant Bit

  1. Initialize an array ans of length n + 1 to store the counts of 1's for each number from 0 to n.
  2. Set ans[0] to 0 because the binary representation of 0 has no 1's.
  3. Loop through the numbers from 1 to n: a. Calculate i / 2 and i % 2. b. Set ans[i] to ans[i / 2] + i % 2.
  4. Return the array ans.
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Pop Count Using Built-in Functions

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