u/Defiant_Pride_6893

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i wasted so much time on b for no reason i was trying to find better way but endup with the idea from where i started just check if count of 3 current no. and last valid place for 1 found is less than half of size ....
after than c was long question in my opinion it was long in solving part logic was easy tbh but reach there took time for me it was multi step processs idk man
i had find freq. and then find sf summation of it and then check the condition with k for each i
i could have got alot better rank i belive if didnt wasted alot of time and b and because it i had no time for d
i could be pupil
btw its my practice account i am pupil on my account

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b question took alot of me ,i would say most of the people just cheated the code for 2 question i had to run every fucking value to see the patter and i finally able to see that 10^x+1 will work and it took alot of my time and also i silly mistake in b of cheacking till only 10^8 not 10^9
c question was on another level of guess system i believe idk how to put it but the proving part took of time . d was a easy problem once you see it took alot less time but due to alot of cheater and gpt usage i got only 7131 rank perfomance of not even a pupil according to rating predictor