Hello everybody

So, i just found out that Springer is offering some free textbooks for free during the COVID-19 situation.

Lucky us, "Guide to Competitive Programming" book is one of them.

Here is the book's link: https://link.springer.com/book/10.1007/978-3-319-72547-5

Thanks pllk for your effort creating this book, and the problemset.

I'm stuck in this problem 225C - Barcode

Here is my solution 33821210

I tried to calculate the array dp[current_column][width_of_current_group][hash_or_dot], and after i read the tutorial saying that i should calculate only dp[current_column][hash_or_dot] i didn't figure out why my solution was wrong.

I think they are the same, can't see any difference... can somebody help?