Hi! I started problem solving from about 10 months ago, but still a newbie. Every time i join a contest, i just solve from one to three problems in div4 or div3 and hardly can i solve one problem in div2 but sometimes, i can find the logic or the answer to the problem. Unfortunately, most of the time, i couldn't be able to write an efficient code so i end up having a lot of wrong answers on a single problem. Could you please give me an advice? I want to be a better problem solver , increase my rate and become a pupil. So, could you please help me?

THANKS.