Add coin change solution

Author: JAEKWANG97

coin-change/jaekwang97.java

@@ -0,0 +1,20 @@
+import java.util.Arrays;
+
+class Solution {
+    public int coinChange(int[] coins, int amount) {
+        int[] dp = new int[amount + 1];
+
+        Arrays.fill(dp, amount + 1);
+        dp[0] = 0;
+
+        for (int i = 1; i <= amount; i++) {
+            for (int coin : coins) {
+                if (i - coin >= 0) {
+                    dp[i] = Math.min(dp[i], dp[i - coin] + 1);
+                }
+            }
+        }
+
+        return dp[amount] == amount + 1 ? -1 : dp[amount];
+    }
+}