(Interactive) Solve It!

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**This problem is interactive. For a guide on interactive problems, please check [this link](https://discuss.codechef.com/t/interactive-problems-and-the-way-to-deal-with-them/21185).** *Deuteragonist: Arnhav Datar. 69 year old forgetful male, sidekick to Raghu. His interests and occupation are of no interest to anyone.* Raghu has an array $(a_1, a_2, … a_N)$ of length $N$ which is hidden.

HINT LADDERno hints yet

L1 Observation

L2 Technique

L3 Approach

L4 Pseudo-code

🔒

L5 Full solution

L5 unlocks only if you insist twice

solution.cppC++17

CodeSearch Tutor

Hints, not spoilers — it won’t hand over the full solution unless you insist.

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