FitnessCenter

package com.company;

import java.util.Scanner;

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

        int countOfVisitors = Integer.parseInt(scanner.nextLine());

        int countOfPeopleTrainingBack = 0;
        int countOfPeopleTrainingChest = 0;
        int countOfPeopleTrainingLegs = 0;
        int countOfPeopleTrainingAbs = 0;
        int countOfPeopleBuyingProteinShake = 0;
        int countOfPeopleBuyingProteinBar = 0;
        for (int visitor = 1; visitor <= countOfVisitors; visitor++) {
            String activity = scanner.nextLine();

            //  ("Back", "Chest", "Legs", "Abs", "Protein shake" или "Protein bar")
            switch (activity) {
                case "Back":
                    countOfPeopleTrainingBack++;
                    break;
                case "Chest":
                    countOfPeopleTrainingChest++;
                    break;
                case "Legs":
                    countOfPeopleTrainingLegs++;
                    break;
                case "Abs":
                    countOfPeopleTrainingAbs++;
                    break;
                case "Protein shake":
                    countOfPeopleBuyingProteinShake++;
                    break;
                case "Protein bar":
                    countOfPeopleBuyingProteinBar++;
                    break;
            }
        }
        System.out.printf("%d - back%n", countOfPeopleTrainingBack);
        System.out.printf("%d - chest%n", countOfPeopleTrainingChest);
        System.out.printf("%d - legs%n", countOfPeopleTrainingLegs);
        System.out.printf("%d - abs%n", countOfPeopleTrainingAbs);
        System.out.printf("%d - protein shake%n", countOfPeopleBuyingProteinShake);
        System.out.printf("%d - protein bar%n", countOfPeopleBuyingProteinBar);

        int countOfPeopleWorkingOut = countOfPeopleTrainingBack
                + countOfPeopleTrainingChest
                + countOfPeopleTrainingLegs
                + countOfPeopleTrainingAbs;

        double percentWorkingOut = ((countOfPeopleWorkingOut * 100.0)/ countOfVisitors) ;
        System.out.printf("%.2f%% - work out%n", percentWorkingOut);

        int countOfPeopleBuying = countOfPeopleBuyingProteinBar
                + countOfPeopleBuyingProteinShake;
        double percentBuying = ((countOfPeopleBuying * 100.0)/ countOfVisitors) ;
        System.out.printf("%.2f%% - protein", percentBuying);
    }
}