Ok, we'll be honest here, being newbies in the field of hackathons, the biggest motivation was to start it and get the experience of how it works, how a project is made, submitted, etc.
We learned so many things, making chatbots, train them, deploy them on websites and mobile applications. Apart from it, we learned about breast cancer a lot and about the potential of teamwork.
Working on the A.I. classifier and getting a whooping test accuracy of more than 95% was really hard. It took several days to find the perfect architecture for our problem.
The biggest challenge was to complete the project and make it working and there were other challenges like the conflict in choices but again having a collective team discussion was the simple solution.