Doofish Set

CodeChefRating 2533Open on judge ↗

Dr.D has invented yet another -inator: the hateinator. He wants to test it on a group of $N$ people (numbered $1$ through $N$). The hateinator may be used any number of times; to use it once, Dr.D should divide these $N$ people into two groups and press the fire button on the hateinator. We call each such grouping a *Doofish set*. Afterwards, there will be hatred between each two people who were i

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