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func countBits(num int) []int {
    results := make([]int, num+1)
    bitsMap := []int{0, 1, 1, 2}
    base := 4

    for i := 0; i < 4; i++ {
        if i > num {
            return results
        }

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func removeElement(nums []int, val int) int {
    n := 0
    for i, num := range nums {
        if num != val {
            nums[n] = nums[i]
            n++
        }
    }
    return n
}

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func longestCommonPrefix(strs []string) string {
    prefix := ""
    
    if len(strs) == 0 {
        return prefix
    }
    
    i := 0
    
    for {

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func romanToInt(s string) int {
    sum := 0
    var prev string

    for i := len(s) - 1; i >= 0; i-- {
        c := string(s[i])
        switch c {
        case "I":
            if prev == "V" || prev == "X" {
                sum -= 1

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func checkPossibility(nums []int) bool {
    const MaxUint = ^uint(0)
    const MaxInt = int(MaxUint >> 1) 
    const MinInt = -MaxInt - 1
    
    chance := true
    max := MinInt
    for i := 0; i < len(nums)-1; i++ {
        if nums[i] > nums[i+1] {
            if chance {

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type MyLinkedList struct {
    head *Node
}

type Node struct {
    next *Node
    val int
}

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# Docker connect to host machine:
1. Use `--net="host"` in docker `run` command, then connet with `127.0.0.1`
2. Use: `host.docker.internal`

# Docker's localhost IP:
172.17.0.1

# Run docker in interactive Bash session
$ docker run -it <image> /bin/bash

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const first = new Promise((resolve, reject) => {
  setTimeout(() => resolve("first"), 1000);
});

const second = new Promise((resolve, reject) => {
  setTimeout(() => reject("second error"), 2000);
});

const third = new Promise((resolve, reject) => {
  setTimeout(() => resolve("third"), 3000);