all done

src/main/java/dev/Main.java

@@ -1,9 +1,11 @@
 package dev;
 
+import dev.model.Student;
 import dev.service.StudentManager;
 import dev.thread.StudentLoader;
 import dev.utils.FileManager;
 
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Scanner;
 
@@ -33,31 +35,32 @@ public class Main {
 
                     List<String> data = FileManager.loadStudents("students.txt");
 
-                    // TODO:
 
-                    // Split data into 3 parts
+                    List<String> part1 = data.subList(0,data.size()/3);
 
-                    List<String> part1 = null;
+                    List<String> part2 = data.subList(data.size()/3,2 * data.size()/3);
 
-                    List<String> part2 = null;
+                    List<String> part3 = data.subList(2 * data.size()/3,data.size());
 
-                    List<String> part3 = null;
 
-                    // TODO:
+                    StudentLoader t1 = new StudentLoader(part1);
 
-                    StudentLoader t1 = null;
+                    StudentLoader t2 = new StudentLoader(part2);
 
-                    StudentLoader t2 = null;
+                    StudentLoader t3 = new StudentLoader(part3);
 
-                    StudentLoader t3 = null;
 
-                    // TODO:
+                    t1.start();
+                    t2.start();
+                    t3.start();
 
-                    // start()
+                    t1.join();
+                    t2.join();
+                    t3.join();
 
-                    // join()
-
-                    // merge results
+                    manager.addStudents(t1.getStudents());
+                    manager.addStudents(t2.getStudents());
+                    manager.addStudents(t3.getStudents());
 
                 }