Envío 5043

Código

import java.util.*;
import java.lang.*;
import java.io.*;

class Main {

    public static void main(String[] args) throws java.lang.Exception {
        Scanner sc = new Scanner(System.in);

        String number = sc.nextLine();
        String v[] = number.split("");
        ArrayList<Integer> list = new ArrayList<>();
        for (int i = 0; i < number.length(); i++) {
            list.add(Integer.parseInt(v[i]));
        }
        // int v[] = {7,9,5,9,9};
        System.out.println(sumOne(list));
    }

    public static String sumOne(ArrayList<Integer> list) {

        for (int i = list.size()-1; i >= 0; i--) {
            int value = list.get(i);
            if(value==9 && i>0){
                list.set(i, 0);
            } 
            else{
               list.set(i, value+1);
               return listToString(list);
            }
        }
        
        return listToString(list);
    }

    public static String listToString(ArrayList<Integer> list) {
        String st = "";
        for (int numb : list) {
            st+=numb;
        }
        return st;
    }
}