Can anyone suggest to me resources, tips, and strategies to solve problems on Binary Search? When I first learned binary search, it looked easy but from time to time, I realized that questions on Binary Search are pretty hard, and sometimes even it becomes difficult to understand that Binary Search is needed to solve this particular problem. Any advice?

What did you do when you saw that you were stuck in a particular rating and didn't see any improvements?

I mean suppose you can solve 3 problems in div2. The same thing has been happening for over 5 months. You are not able to improve your level. So, what should he/she do for this?

I have just completed Dijkstra, Bellman-Ford & Floyd Warshall algorithm. Can anyone suggest to me some good essential problems?