Hello cf community, I always get stuck at finding patterns if I have to create them from scratch, but other constructive problems around similar or even higher levels i can solve easily..
Eg of what I'm talking about:
https://www.codechef.com/problems/GRIDEVEN
Maybe i would feel much more confident and improve my intuition if I can solve similar problems, so please share if you have any construction-based problems that you feel is nice and tough!
CF Round 804 problem B
Direct Link: https://mirror.codeforces.com/contest/1699/problem/B
Exactly, I am stuck at it for more than an hour now but the difficulty is 900!?
I cannot even approach; what is wrong with me :(
Please share what were your first thoughts on seeing it
Update: The sum is easy once you solve it(obviously) Takeaway is that I should not have gone with the mindset that it is hard!
problem
https://mirror.codeforces.com/problemset/problem/1485/D
Here you go:
Problem