public class Main {

    public static void main(String[] args) throws FileNotFoundException {
        File inputFile = new File("input-data/day11.txt");
        Scanner scanner = new Scanner(inputFile);
        String stoneLine = scanner.nextLine();
        List<Long> stones = new ArrayList<>(Arrays.stream(stoneLine.split(" "))
                .mapToLong(Long::parseLong).boxed().toList());

        Map<Long, List<Long>> transformationMapAll = new HashMap<>();
        Map<Long, Long> transformationCount = new HashMap<>();

        for (int i = 0; i < 25; i++) {
            transformationCount = new HashMap<>();
            for (Long stone : stones) {
                transform(stone, transformationMapAll, transformationCount);
            }
            stones = new ArrayList<>();
            for (Map.Entry<Long, List<Long>> tr : transformationMapAll.entrySet()) {
                if (transformationCount.containsKey(tr.getKey())) {
                    for (int j = 0; j < transformationCount.get(tr.getKey()); j++) {
                        stones.addAll(transformationMapAll.get(tr.getKey()));
                    }
                }
            }
        }

        long sum = 0;
        for (Map.Entry<Long, Long> tr : transformationCount.entrySet()) {
//            System.out.println(tr);
            sum += tr.getValue() * transformationMapAll.get(tr.getKey()).size();
        }
        System.out.println(sum);

    }

    private static void transform(long stone, Map<Long, List<Long>> transformationMap,
                                  Map<Long, Long> transformationCount) {

        if (transformationMap.containsKey(stone)) {
            long old = transformationCount.getOrDefault(stone, 0L);
            transformationCount.put(stone, old + 1);
        } else {
            if (stone == 0) {
                transformationMap.put(stone, Collections.singletonList(1L));
                transformationCount.put(stone, 1L);
            } else if (((long) (Math.log10(stone) + 1)) % 2 == 0) {
                long length = (long) (Math.log10(stone) + 1);
                long left = (long) (stone / Math.pow(10, length / 2));
                long right = (long) (stone % Math.pow(10, length / 2));
                List<Long> list = new ArrayList<>();
                list.add(left);
                list.add(right);
                transformationMap.put(stone, list);
                transformationCount.put(stone, 1L);
            } else {
                transformationMap.put(stone, Collections.singletonList(stone * 2024));
                transformationCount.put(stone, 1L);
            }
        }

    }
}