Хистограма

import java.text.DecimalFormat;
import java.util.Scanner;

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

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

        int p1 = 0;
        int p2 = 0;
        int p3 = 0;
        int p4 = 0;
        int p5 = 0;

        for (int i = 0; i < n; i++) {
            int currentNum = Integer.parseInt(scanner.nextLine());

            if(currentNum < 200){
                p1++;
            }else if(currentNum >= 200 && currentNum <= 399){
                p2++;
            }else if(currentNum >= 400 && currentNum <= 599){
                p3++;
            }else if(currentNum >= 600 && currentNum <= 799){
                p4++;
            }else if(currentNum >= 800){
                p5++;
            }
        }

        System.out.printf("%.2f%%\n",(double) p1 / n * 100);
        System.out.printf("%.2f%%\n",(double) p2 / n * 100);
        System.out.printf("%.2f%%\n",(double) p3 / n * 100);
        System.out.printf("%.2f%%\n",(double) p4 / n * 100);
        System.out.printf("%.2f%%\n",(double) p5 / n * 100);
    }
}