I used generator. :)

May be something like this:

3 3 3-a 2-b 3-a 1-a 2-b 2-a

I hacked 8 solution in n=5000 k = 100000 case :)

Now i am sad. :( Submitted C with just an wild guess (didnt have much time after solving B) , felt happy with the bonus 15 points in contest time , and now i see handling only one case could give me full points :/

Nice problemset, thank you. :) faced some problem implementing binary search in second problem,managed to solve it in 52 minutes.

How to solve D?

I know Ford-Fulkersion , Edmond-Carp and Dinic's algorithom to find maximum flow and i am still blue. :P

Actually in our country most of the coders emphasize more in learning new new algorithms rather than increasing analytical skills.

Me not so lucky! hacked in 2:28 with case k==n :(

I found that my solution of A is completely wrong after locking the problem! -_- howeever, the problem says to check whether the given string contains both AB and BA as a substring. and AB and BA should not be overlapped (like ABA )

That is Bengali, not Tamil or urdu.

Problem description says: "transform the initial number x to the minimum possible positive number by inverting some (possibly, zero) digits". so you can't discard leading zeros,only operation you are allowed to do is invert some (or zero) digits.

I handled this case, still got WA in test 12 :(

He asked for DIV-1 C, which is our E.

This is dynamic score distribution. :)

"As the problems are varied, we hope you'll find at least one problem of your taste."- are you kidding, fchirica?

leaving contest arena, this contest is not for me. :(

I didn't get this verdict. :) saw it on judge status. this submission: 6524921

What is ''Idleness time limit exeeded''?First time saw this verdict in cf. :/