package main

import (
	"crypto/sha1"
	"fmt"
	"strconv"
)

func rgbFromHex(hex string) (int, int, int) {
	r, _ := strconv.ParseUint(hex[0:2], 16, 8)
	g, _ := strconv.ParseUint(hex[2:4], 16, 8)
	b, _ := strconv.ParseUint(hex[4:6], 16, 8)
	return int(r), int(g), int(b)
}

func hash(str string) string {
	h := sha1.New()
	h.Write([]byte(str))
	res := h.Sum(nil)
	return fmt.Sprintf("%x", res)
}

func hasBit(n uint64, pos int) bool {
    val := n & (1 << pos)
    return (val > 0)
}