Today was my first time participating in open hacking phase. I tried & lost 50 points for an Unsuccessful Hacking Attempt. But I don't want this to stop me from submitting hacks in future. I really want to know how people end up making so many Successful Hacking Attempts! How do you guys find exploitable code & what do you use to generate the testcases?

I don't want my Codeforces journey to be just about problem solving; I really wanna hack in contests & be successful at it!

Any guidance from experienced hackers would be really helpful for me as well as for others who may or may not have given hacking a thought.

EDIT: Turns out one doesn't lose points during open hacking phase (Div. 3/4) through Unsuccessful Hacking Attempts (yay!). Please correct me if I'm wrong!

I'm still looking forward to valuable guidance for future hacking attempts!