finished up to task_3

README.md

@@ -24,7 +24,7 @@ can make pull requests to that repo during the Task 3 activity during the lab.
 During lab, you should not fork directly from https://github.com/CSC207-2023F-UofT/Lab2.
 If you miss the lab and work on this after, you should use this URL though.
 
-- [ ] Make a fork of this repo and clone a local copy (as you did in Lab 1).
+- [X] Make a fork of this repo and clone a local copy (as you did in Lab 1).
   - Important: make sure to uncheck the option to only fork the main branch, as the repo
   contains some branches you will use in this lab.
 

src/DataTypes.java

@@ -1,10 +1,11 @@
+import java.util.ArrayList;
 import java.util.List;
 
 public class DataTypes {
     // TODO TASK 1: fix this code so that it passes the test in DataTypesTest.java
     public static long sum(List<Integer> numbers) {
 
-        int s = 0;
+        long s = 0;
         // below is a "foreach" loop which iterates through numbers
         for (int x : numbers) {
             s += x;