Xor Palindrome

CodeChefRating 1129Open on judge ↗

You are given a binary string $A$ of length $N$. You can perform the following type of operation on the string $A$: - Choose two **different** indices $i$ and $j$ $(1\leq i,j\leq N)$; - Change $A_i$ and $A_j$ to $A_i \oplus A_j$. Here $\oplus$ represents the [bitwise XOR](https://en.wikipedia.org/wiki/Bitwise_operation#XOR) operation. Find the **minimum** number of operations required to convert

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