Rules:

1. 1. Having an Accepted is your goal solving this exercise; You can submit answers more than once
2. 2. When running submitted solutions, URI Online Judge expects them to read the input of a test case from stdin and output an answer to stdout, which should match the right answer absolutely;
3. 3. The deadline for submitting solutions is till 30/07.

The estimated time to solve this challenge is between 40 minutes to 1 hour.