271. Encode and Decode Strings

Author: Partho Biswas

README.md

@@ -182,6 +182,7 @@ I have solved quite a number of problems from several topics. See the below tabl
 |18| [567. Permutation in String](https://leetcode.com/problems/permutation-in-string/)| [Python](https://tinyurl.com/wu6rdaw/567_Permutation_in_String.py)| **[Must](https://tinyurl.com/y8jsku3f)** | Medium | 📌 Sliding window |
 |19| [844. Backspace String Compare](https://leetcode.com/problems/backspace-string-compare/)| [Python](https://tinyurl.com/wu6rdaw/844_Backspace_String_Compare.py)| --- | Easy | 📌 Two Pointer |
 |20| **[809. Expressive Words](https://tinyurl.com/vuv9uud)**| [Python](https://tinyurl.com/wu6rdaw/809_Expressive_Words.py)| [Art 1](https://tinyurl.com/rzlvfn7) | Medium | 📌 Logic ad analytical prolem |
+|21| **[271. Encode and Decode Strings](https://tinyurl.com/u7hce8m)**| [Python](https://tinyurl.com/wu6rdaw/271_Encode_and_Decode_Strings.py)| [Art 1](https://tinyurl.com/wurc9am) | Medium | 📌 TODO: Check the second approach. Very Important |
 
 
 </p>

leetcode.com/python/271_Encode_and_Decode_Strings.py

@@ -0,0 +1,57 @@
+# Solution 1
+class Codec:
+
+    def encode(self, strs):
+        """Encodes a list of strings to a single string.
+
+        :type strs: List[str]
+        :rtype: str
+        """
+        if len(strs) == 0:
+            return unichr(258)
+        return unichr(257).join(singleStr.encode('utf-8') for singleStr in strs)
+
+    def decode(self, s):
+        """Decodes a single string to a list of strings.
+
+        :type s: str
+        :rtype: List[str]
+        """
+        if s == unichr(258):
+            return []
+        return s.split(unichr(257))
+
+# Your Codec object will be instantiated and called as such:
+# codec = Codec()
+# codec.decode(codec.encode(strs))
+
+
+
+
+
+# Solution 2
+class Codec:
+
+    def encode(self, strs):
+        """Encodes a list of strings to a single string.
+
+        :type strs: List[str]
+        :rtype: str
+        """
+        if len(strs) == 0:
+            return unichr(258)
+        return unichr(257).join(singleStr.encode('utf-8') for singleStr in strs)
+
+    def decode(self, s):
+        """Decodes a single string to a list of strings.
+
+        :type s: str
+        :rtype: List[str]
+        """
+        if s == unichr(258):
+            return []
+        return s.split(unichr(257))
+
+# Your Codec object will be instantiated and called as such:
+# codec = Codec()
+# codec.decode(codec.encode(strs))