Good count

CodeChefOpen on judge ↗

DY and DX received an array generator on the occasion of Codigo and being the math buffs that they are, a math game was quickly formulated. Consider an array $A$ which consists of $N$ elements $A_1, A_2, ..., A_N$. An index $i$ of the given array is considered good if $A_i = i$. DY wins the game if the count of good indices in the array is co-prime to the size of the array, while DX wins the ot

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