Methods to solve big problems.
By not wasting time on asking these type of questions on discuss XD.
These type of qs are already answered a lot of times in discuss . You can search and check out there.
I don’t mean to insult or demotivate u just a humble request that before posting every single qs on discuss u can search for the relevant topics .
This will help save ur time as well as others .
Coming to your answer practicing hard problems is the only method of solving big questions.
Again don’t feel I was rude to u . It’s just a humble request.