Based on the exercise found here: https://adventofcode.com/2020/day/1
There is an issue with the expense report.
Specifically, they need you to find the two entries that sum to 2020. When the sum is 2020, then multiply those two numbers together. This is the answer to the excercise.
The in.txt file was copied from the excercise and saved as a txt file using VSCode. The program was written, compiled, and ran as a Java 14 Applet in in Eclipse.