Binary Search the Answer

start with a question first pick question Aggressive cows on spoj related to binary search and read answer of that question at https://www.quora.com/What-is-the-correct-approach-to-solve-the-SPOJ-problem-Aggressive-cow689 (raziman answer) and binary search is not limited to sorted array read once again topcoder tutorial it helps you .

If you know how to binary search an element in an ordered list, then that is all you need to know. The tricky part is looking at a problem and knowing that the answer involves an ordered list so that you can use a binary search. This just comes with practice.

It may be useful for you to ask specific questions about things you don't understand. That article is where I would usually point someone asking your questions.

We are hosting a meetup in which we work on and solve the Aggressive Cow problem. We would love it if anyone from SPOJ could join us! https://www.meetup.com/social-coding-virtual/events/275568322/58