Dynamic Programming #01
Medium Coin Change
Compute the fewest reusable coins needed to reach the target amount, or report that it is impossible.
Solved dynamic programmingunbounded knapsackminimum transitions
State design, transition choices, and subproblem reuse without overcomplicating the implementation. The focus here is state compression and transition design. Official LeetCode problems are linked on every page instead of being mirrored here.
Every page keeps the problem summary, recognition pattern, reasoning, pitfalls, and the exact C++ source used on the site.
Compute the fewest reusable coins needed to reach the target amount, or report that it is impossible.