Concepts4

Groups

Proof Techniques for Greedy Algorithms

Greedy algorithm correctness is usually proved with patterns like exchange argument, stays-ahead, structural arguments, cut-and-paste, and contradiction.

#greedy algorithms#exchange argument#stays ahead+12

⚙️AlgorithmAdvanced

Aliens Trick (WQS Binary Search)

Aliens Trick (WQS Binary Search) converts a hard “exactly k items” optimization into an unconstrained problem by adding a penalty λ per chosen item.

#aliens trick

Concepts4

Proof Techniques for Greedy Algorithms

Aliens Trick (WQS Binary Search)

Greedy - Exchange Argument

Greedy Algorithms