Unbounded knapsack is simpler than 0/1:
One dimension instead of two (no item index needed)
Forward iteration instead of backward
Same item can contribute to multiple times The pattern generalizes: Coin Change is unbounded knapsack where you count ways instead of finding the largest value. Rod Cutting is unbounded knapsack where length is weight. When you see "unlimited copies" or "can repeat," think unbounded knapsack.