- Thoughts.
- I get partial points for N=20, but why are the restrictions so loose?
- You say the range of monotonically increasing and monotonically decreasing is a mountain, so why not just take one lick from the head to the other?
- Official Explanation
- I was getting to the full score solution no-stop.
- The assumption was “O(N) for all three pairs, resulting in O(N^4)”
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