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Your solution for the Coin Change problem is excellent. You have implemented the dynamic programming approach efficiently with O(m*n) time and O(n) space, which is optimal for this problem. Your code is clean and well-commented. The approach is correct and handles all edge cases. One minor note: in the problem constraints, the coins can be as large as 2^31-1, but the amount is only up to 10^4. So, when iterating with each coin, if a coin is larger than the amount, it can be skipped to avoid unnecessary iterations. However, this is a minor optimization and does not change the overall complexity. For example, you could add a check before the inner loop to skip coins that are larger than the current target (but since the inner loop starts from the coin value, if the coin is larger than amount, the inner loop won't run anyway). So it's already handled. Overall, great job! |
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