Try to think simpler in contest,do as the question says and try to think what effect does the operations or the logic does in the code. If it is to find a answer try binary search, if it is to calculate minimum or maximum try dp, think greedy in A and B

My opinion: don't think about how I can do this problem, but rather think why does the problemsetter make the problem like this. Find special properties in the problem. e.g. if you see a problem with $$$a\oplus b$$$, think about its parity ($$$a\oplus b \equiv a+b \pmod 2$$$) or its size ($$$a\oplus b \le a+b$$$).

An important thing is, do more useful practising.

UPD: Bro you've only practised on CF for ten months. I was also stuck in grey for ten months. So don't give up.

You Cannot Expect your rating to improve by just solving easy questions try practicing harder questions I can see that you have solved 600 problems out of which most are of low rating. If your target rating is x then you must be proficient in solving problems rated x+300 within contest. Although in div2 problems are mostly greedy especially A,B,C which depend on your intuition. But in div3 this thing will surely help.