Fading Coder

Recovering Secret Values from Sum Permutations Given a collection of seven integers that represent a permutation of $A, B, C, A+B, B+C, A+C,$ and $A+B+C$ (with the constraint $A \le B \le C$), the objective is to isolate the original base values. Sorting the input array in ascending order immediatel...

Composite Coloring with Bounded Prime Factors Problem Specification Given a sequence of composite integers $a$ of length $n$, assign colors such that the greatest common divisor of all numbers sharing the same color exceeds $1$. The total number of distinct colors must not exceed $11$. Constraints:...