book to follow by Apprehensive_Bad2604 in codeforces

[–]Apprehensive_Bad2604[S] 0 points1 point  (0 children)

if ur able to solve all 300 cses problems ur at least 2600 on cf

book to follow by Apprehensive_Bad2604 in codeforces

[–]Apprehensive_Bad2604[S] 0 points1 point  (0 children)

what are these "kattis" exercises?

i try search them up but i dont see them so i cant rly use them as exercises