The Nandhini Cipher

CodeChefOpen on judge ↗

When Vanthiyathevan comes to visit Nandhini, he sees her trying to hide a secret letter in a locker. He suspects that it is a letter from the Pandiyas. When Nandhini leaves the room, Vanthiyathevan sneaks in and finds a set of $2N$ keys in front of the locker, with numbers written on each key. He suddenly remembers that one must shuffle the keys $K$ times to find out the correct order of keys to o

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