Now I move on to one of the most famous problems in dynamic programming: Knapsack. Knapsack problems appear everywhere in DP (dynamic programming).
Choosing items under a budget, selecting tasks within a time limit, balancing cost (what you spend) and reward (what you gain). Many harder DP problems are knapsack in disguise. By the end, you'll solve three variations: 0/1 knapsack, value-based knapsack, and unbounded knapsack. Each one builds on the last.