feat: Solve encode-and-decode-strings problem

Author: hu6r1s

encode-and-decode-strings/hu6r1s.py

@@ -0,0 +1,14 @@
+class Solution:
+    """
+    @param: strs: a list of strings
+    @return: encodes a list of strings to a single string.
+    """
+    def encode(self, strs):
+        return "secretKey!@#".join(strs)
+
+    """
+    @param: str: A string
+    @return: decodes a single string to a list of strings
+    """
+    def decode(self, str):
+        return str.split("secretKey!@#")