LI.GCD code in another way of solving

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public static int findEarliestMeetingTime(List<List<int[]>> schedules, int length) {
int DAY_END = 24 * 60;

List<int[]> allMeetings = new ArrayList<>();
for (List<int[]> employeeMeetings : schedules) {
allMeetings.addAll(employeeMeetings);
}

Collections.sort(allMeetings, (a, b) -> Integer.compare(a[0], b[0]));

int earliestAvailable = 0;
for (int[] meeting : allMeetings) {
if (earliestAvailable + length <= meeting[0]) {
return earliestAvailable;
}
earliestAvailable = Math.max(earliestAvailable, meeting[1]);
}

if (earliestAvailable + length <= DAY_END) {
return earliestAvailable;
}

return -1;
}

public static int findMaximumGreatness(int[] arr) {
int n = arr.length;
Arrays.sort(arr);

int greatness = 0;
int j = 0;

boolean[] used = new boolean[n];

for (int i = 0; i < n; i++) {
while (j < n && (used[j] || arr[j] <= arr[i])) {
j++;
}
if (j < n && arr[j] > arr[i]) {
used[j] = true;
greatness++;
j++;
}
}

return greatness;
}

class Result {

    public static void goodSequence(BufferedReader bufferedReader) throws IOException {
        StringTokenizer st = new StringTokenizer(bufferedReader.readLine());
        int T = Integer.parseInt(st.nextToken());

        for (int t = 0; t < T; t++) {
            st = new StringTokenizer(bufferedReader.readLine(), ",");
            int N = Integer.parseInt(st.nextToken());
            int M = Integer.parseInt(st.nextToken());

            st = new StringTokenizer(bufferedReader.readLine(), ",");
            int[] sequence = new int[N];
            for (int i = 0; i < N; i++) {
                sequence[i] = Integer.parseInt(st.nextToken());
            }

            String result = solveTestCase(N, M, sequence);
            System.out.println(result);
        }
    }

    private static String solveTestCase(int N, int M, int[] sequence) {
       
        int countDivisible = 0;
        for (int x : sequence) {
            if (x % M == 0) {
                countDivisible++;
            }
        }

        if (countDivisible == 0) {
            return "0/1";
        }

        long totalSubsequences = (1L << N) - 1;
        long goodSubsequences = (1L << countDivisible) - 1;


        long P = goodSubsequences;
        long Q = totalSubsequences;

        long commonDivisor = gcd(P, Q);

        P /= commonDivisor;
        Q /= commonDivisor;

        return P + "/" + Q;
    }

    private static long gcd(long a, long b) {
        while (b != 0) {
            long temp = b;
            b = a % b;
            a = temp;
        }
        return a;
    }
}

import java.util.*;

public class Maib {

    private static int reverseNumber(int num) {
        int reversed = 0;
        while (num != 0) {
            reversed = reversed * 10 + num % 10;
            num /= 10;
        }
        return reversed;
    }

    private static int largestPossibleNumber(int num) {
        char[] digits = String.valueOf(num).toCharArray();
        Arrays.sort(digits);
        StringBuilder largestNumStr = new StringBuilder(new String(digits)).reverse();
        return Integer.parseInt(largestNumStr.toString());
    }

    private static List<Integer> splitIntoDigits(int num) {
        List<Integer> digits = new ArrayList<>();
        while (num != 0) {
            digits.add(num % 10);
            num /= 10;
        }
        Collections.reverse(digits);
        return digits;
    }

    public static String processAndEncodeArray(int[] arr) {
        for (int i = 0; i < arr.length; i++) {
            arr[i] = reverseNumber(arr[i]);
        }
       
        for (int i = 0; i < arr.length; i++) {
            arr[i] = largestPossibleNumber(arr[i]);
        }
       
        List<Integer> allDigits = new ArrayList<>();
        for (int num : arr) {
            allDigits.addAll(splitIntoDigits(num));
        }
       
        Set<Integer> uniqueDigits = new LinkedHashSet<>(allDigits);
        List<Integer> uniqueDigitList = new ArrayList<>(uniqueDigits);
       
        // Step 5: Generate the encoded string
        StringBuilder encodedString = new StringBuilder();
        for (int digit : uniqueDigitList) {
            if (digit == 0) {
                encodedString.append('$');
            } else if (digit % 2 == 0) {
                encodedString.append('*');
            } else {
                encodedString.append('#');
            }
        }
       
        return encodedString.toString();
    }

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int n = scanner.nextInt();
        int[] arr = new int[n];
        for (int i = 0; i < n; i++) {
            arr[i] = scanner.nextInt();
        }

       String result = processAndEncodeArray(arr);

        System.out.println(result);
    }
}

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