04. Count Real Numbers

package DPM;

import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.Scanner;
public class Main {
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        double [] nums = Arrays.stream(scan.nextLine().split(" ")).mapToDouble(Double::parseDouble).toArray();
        LinkedHashMap<Double, Integer> sets = new LinkedHashMap<>();
        for (int i = 0; i < nums.length; i++) {
            if (sets.containsKey(nums[i])){
                sets.put(nums[i], sets.get(nums[i])+1);
            }else {
                sets.put(nums[i], 1);
            }
        }
        for (Double aDouble : sets.keySet()) {
            System.out.printf("%.1f -> %d", aDouble, sets.get(aDouble));
            System.out.println();
        }
    }
}