Untitled

import java.util.*;
public class Main {
    public static void main(String[] args) {

        System.out.println("Welcome! How many people will be attending today?");
        Scanner sc = new Scanner(System.in);
        int totalNr = sc.nextInt();
        int grSizeTotal = 0;
        int groupsNr, size;

        if(totalNr > 1 && totalNr <= 56) {
            System.out.println("Awesome! How many groups are there?");
            groupsNr = sc.nextInt();
            System.out.println("Amazing! Could you tell us how many groups will there be for each size?");
            int[] arr_groups = new int[5];;
            if(grSizeTotal <= groupsNr) {
                for(int i = 2; i <= 6; ++i){
                    System.out.println("Group size " + i + " :");
                    size = sc.nextInt();
                    grSizeTotal += size;
                    arr_groups[i - 2] = size;
                }
                System.out.println("All done. There will be a total of " + totalNr + " people, with " + groupsNr + " groups and for each group, there will be: ");
                for(int i = 2; i<= 6; ++i) {
                    System.out.println("Group " + i + ": " + arr_groups[i - 2]);
                }

                int tables6Count = 0;
                int emptySpaces = 0;
                int seatsLeft = 6;
                for (int i = 6; i >= 2; --i) {
                    int current_size = arr_groups[i-2];
                    int group_size = i;
                    for (int j = current_size; j > 0; --j) {
                        if (seatsLeft >= group_size){
                            seatsLeft -= group_size;
                        } else {
                            ++tables6Count;
                            emptySpaces += seatsLeft;
                            seatsLeft = 6;
                            seatsLeft -= group_size;
                        }
                    }

                }

                System.out.println("There will be " + tables6Count + " tables which will have the capacity for 6 people. The total vacant seats are " + emptySpaces);

            } else {
                System.out.println("Can you make sure you entered the correct groups number please?");
            }
        } else {
            System.out.println("We are sorry, we don't have this availability. Please try again.");
        }






    }
}