package main

import (
	"math"
)

func main() {
}

func step(start, next []uint64) []uint64 {
	for _, stone := range start {
		if stone == 0 {
			next = append(next, 1)
			continue
		}
		length := uint64(math.Log10(float64(stone))) + 1

		if length%2 == 0 {
			mod := uint64(math.Pow10(int(length / 2)))
			next = append(next, stone/mod, stone%mod)
			continue
		}
		next = append(next, stone*2024)
	}
	return next
}