I have been trying BOOKLIST Contest Page | CodeChef question for a while but i am only able to fetch 60 points. I am using vectors to insert and erase elements. But because of complexity of erase,O(N), I am getting TLE. Can someone point me in the right direction. Is their some standard algorithm to solve these types of questions??
Here is my code: DVv5CN - Online C++ Compiler & Debugging Tool - Ideone.com
The hint i would suggest for this problem would be to think about sorting the set of book already issued.Here is the link to solved problem:zjshg7 - Online C++ Compiler & Debugging Tool - Ideone.com
ask me if any further doubts arises.