Minimum Coin Combination

You are given an array of coin values and a target amount of money. Return the minimum number of coins needed to total the target amount. If this isn't possible, return ‐1. You may assume there's an unlimited supply of each coin.

Example 1:

Input: coins = [1, 2, 3], target = 5
Output: 2

Explanation: Use one 2-dollar coin and one 3-dollar coin to make 5 dollars.

Example 2:

Input: coins = [2, 4], target = 5
Output: -1