How I approach Maths and Number theory Problems on Codeforces 

Bhai kya tuje bhi new question ke answers dekhna pada ya kudse sare hojathe. Kithe minutes try karne ke baad answers dekhto ho

Give atleast 30 minutes and then see editorial, at start you will struggle to solve problems but eventually improve.

Try to solve recent 800 and 900 rating problem. Try 1 hour timre hurt and soul, If you get struck, then see editorial or vedio solution from You Tube.

What 200 questions did you solve though? If you keep solving problems inside your comfort zone, you won't grow even if you solve 1000 of those.

I suggest you stop looking for shortcuts. There's no shortcut, just practice.

Congrats on AIR 1!!