Rogue String

CodeChefOpen on judge ↗

The Spartan IV program servers are well-protected by multiple layers of security. The threat, however, comes from an AI of its own called Kortana who recently has gone rogue and aims to seize the servers by stealing the keys that protect the same. Now, you must help Master Cheif to re-establish the control by recovering the server keys. Formally, the key is a string of length $N$ consisting of

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.

voice by Sarvam AI