juniorGreedy Algorithms
Properties of Greedy Algorithms
Updated Apr 28, 2026
Short answer
Greedy Choice Property and Optimal Substructure are the two main requirements.
Deep explanation
Greedy algorithms are defined by the 'Greedy Choice Property'. Greedy Choice Property and Optimal Substructure are the two main requirements. Unlike backtracking, once a choice is made, it is never reconsidered.
Real-world example
Giving change with the fewest coins in a standard currency.
Common mistakes
- Assuming greedy works for all optimization problems without proof.
Follow-up questions
- Is Greedy always faster than DP?