Create NumCoinChange.java

Author: Foxeyyy

NumCoinChange.java

@@ -0,0 +1,23 @@
+class Solution {
+    
+    public int coinChange(int[] coins, int amount) {
+        
+        int[] memo = new int[amount + 1];
+        
+        Arrays.fill(memo, amount + 1);
+        
+        memo[0] = 0;
+        
+        for(int i = 1; i <= amount; i++) {
+            for(int coin: coins) {
+                if(coin <= i) {
+                    memo[i] = Math.min(memo[i], memo[i - coin] + 1);
+                }
+            }
+        }
+        
+        return memo[amount] > amount ? -1 : memo[amount];
+        
+    }
+
+}