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    Practice problems / Counting bits

    Counting bits

    Easybit manipulationdynamic programming

    Return an array of length n + 1 where element i is the number of 1 bits in i's binary form. Aim for O(n).

    Example 1

    Input:  n = 2
    Output: [0,1,1]

    Example 2

    Input:  n = 5
    Output: [0,1,1,2,1,2]

    Constraints

    • 0 ≤ n ≤ 10⁵

    Submit checks your solution against 8 tests, including hidden ones.

    /**
     * @param {int} n
     * @return {int[]}
     */
    function countBits(n) {
      
    }
    
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