diff --git a/CoinChange.java b/CoinChange.java
new file mode 100644
index 0000000..8e883db
--- /dev/null
+++ b/CoinChange.java
@@ -0,0 +1,23 @@
+class Solution {
+    public int coinChange(int[] coins, int amount) {
+      if (amount == 0) return 0;
+      int[] change = new int[amount+1];
+      change[0] = 0;
+      for (int c : coins) {
+        if (c <= amount)
+          change[c] = 1;
+      }
+      for (int i = 1; i <= amount; i++) {
+        if (change[i] == 1) continue;
+        int min = -1;
+        for (int c:coins) {
+          if (i - c>0 && change[i-c] != -1) {
+            int withC = change[i-c] + 1;
+            min = min < 0 ? withC : Math.min(withC, min);
+          }
+        }
+        change[i] = min;
+      }
+      return change[amount];
+    }
+}
diff --git a/Strong Password Checker b/Strong Password Checker
new file mode 100644
index 0000000..e9ed0cb
--- /dev/null
+++ b/Strong Password Checker	
@@ -0,0 +1,16 @@
+import java.util.regex.*;
+class Solution {
+    public int strongPasswordChecker(String password) {
+        Pattern strongPattern = Pattern.compile("^(?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])[a-zA-Z0-9!\\.]{6,20}$");
+        if (strongPattern.matcher(password).matches()) return 0;
+        
+        if (password.length() <= 3) {return 6-password.length();}
+        int distance = 0;
+        if (password.length() > 20) {distance = password.length()-20; }
+
+        
+     Pattern repeatedChar = Pattern.compile("([A-Za-z0-9])\1\1");
+        if (repeatedChar.matcher(password).matches()) distance++;
+        return distance;
+    }
+}