pure java... package geeksforgeeks; import java.util.*;

public class Maxnumber {

public static void main(String[] args) {
    int module, sum = 0, maxNumber = 0, start = 0, repeat = 2, sumofarray = 0, decrese = 1;
    Scanner sc = new Scanner(System.in);

    System.out.println("size");
    int n = sc.nextInt();
    int arr[] = new int[n];

    System.out.println("element");
    for (int i = 0; i < n; i++) {
        arr[i] = sc.nextInt();
    }

    System.out.println("modulo");
    module = sc.nextInt();

    // Sum of the whole array
    for (int i = 0; i < arr.length; i++) {
        sum += arr[i];
    }

    int remainder = sum % module;
    maxNumber = Math.max(remainder, maxNumber);

    // Check subarrays with different lengths
    while (start != arr.length - 1) {
        int x = 0;
        int index = start;  // Start index for each iteration

        while (x != repeat && index < arr.length) {  // Prevent out of bounds
            for (int j = 0; j < decrese && index < arr.length; j++) {
                sumofarray += arr[index];
                index++;
            }
            remainder = (sum - sumofarray) % module;
            maxNumber = Math.max(remainder, maxNumber);
            sumofarray = 0;  // Reset sum for the next subarray
            x++;
        }
        start++;
        repeat++;
        decrese++;
    }

    System.out.println(maxNumber);

            (using array in java)...................



            sc.close();
}

}