Binary Matrix

CodeChefOpen on judge ↗

Chef gives you a matrix $A$ of size $N \cdot M$ containing only zeros and ones. In one operation, you can swap any $2$ columns. You can apply this operation any number of times. What is the area (total number of cells) of the largest [submatrix](https://mathworld.wolfram.com/Submatrix.html) of the given matrix **containing all ones** you can achieve if you apply the operations optimally? ### Inp

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