Weightlifting [Java Exam]

package com.sve;

import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        Map<String, Map<String, Long>> list = new TreeMap<>();
        long linesCount = Long.parseLong(scan.nextLine());
        for (int i = 0; i < linesCount; i++) {
            String[] tempLineSplit = scan.nextLine().split(" ");
            if (list.containsKey(tempLineSplit[0])) {
                if (list.get(tempLineSplit[0]).containsKey(tempLineSplit[1])) {
                    Map<String, Long> oldMap = list.get(tempLineSplit[0]);
                    oldMap.put(tempLineSplit[1], oldMap.get(tempLineSplit[1]) + Long.parseLong(tempLineSplit[2]));
                }
                else {
                    list.get(tempLineSplit[0]).put(tempLineSplit[1], Long.parseLong(tempLineSplit[2]));
                }
            }
            else {
                Map<String,Long> newMap = new TreeMap<>();
                newMap.put(tempLineSplit[1], Long.parseLong(tempLineSplit[2]));
                list.put(tempLineSplit[0], newMap);
            }
        }
        for (Map.Entry<String, Map<String, Long>> entry : list.entrySet()) {
            String mapString = entry.getValue().toString()
                    .replace("{", "")
                    .replace("}", "")
                    .replace("=", " - ")
                    .replace(", ", " kg, ")
                    + " kg";

            System.out.println(entry.getKey() + " : " + mapString);
        }
    }
}