Update Lecture1.hs

[chikkim]

Solutions for Lecture {NUMBER}

cc @chshersh

[chshersh]

Hi @chikkim 👋🏻

I see that you opened a Pull Request in the original exercises GitHub repository and not in your fork. It's recommended to ask for feedback in your own fork, so you can eventually merge the PR after applying fixes. It also will be easier for me to review, as I do this in my free time and have limited resources.

If you find the fork-pr workflow inconvenient, I can still provide the review here, but I won't be able to merge your solutions and my reviews may take longer. Let me know if that's okay with you!