feat(work): add LeetCode solutions for 217, 271, and 98

work/1/Medium/Array/271.encode-and-decode-strings.py

@@ -0,0 +1,92 @@
+"""
+271. Encode and Decode Strings
+Difficulty: Medium
+https://leetcode.com/problems/encode-and-decode-strings/
+
+──────────────────────────────────────────────────
+
+Design an algorithm to encode a list of strings to a string. The
+encoded string is then sent over the network and is decoded back to
+the original list of strings.
+
+Machine 1 (sender) has the function:
+
+string encode(vector<string> strs) {
+  // ... your code
+  return encoded_string;
+}
+Machine 2 (receiver) has the function:
+
+vector<string> decode(string s) {
+  //... your code
+  return strs;
+}
+
+So Machine 1 does:
+
+string encoded_string = encode(strs);
+
+and Machine 2 does:
+
+vector<string> strs2 = decode(encoded_string);
+
+strs2 in Machine 2 should be the same as strs in Machine 1.
+
+Implement the encode and decode methods.
+
+You are not allowed to solve the problem using any serialize methods
+(such as eval).
+
+ 
+
+Example 1:
+
+Input: dummy_input = ["Hello","World"]
+Output: ["Hello","World"]
+Explanation:
+Machine 1:
+Codec encoder = new Codec();
+String msg = encoder.encode(strs);
+Machine 1 ---msg---> Machine 2
+
+Machine 2:
+Codec decoder = new Codec();
+String[] strs = decoder.decode(msg);
+
+Example 2:
+
+Input: dummy_input = [""]
+Output: [""]
+
+ 
+
+Constraints:
+
+	• 1 <= strs.length <= 200
+
+	• 0 <= strs[i].length <= 200
+
+• strs[i] contains any possible characters out of 256 valid ASCII
+characters.
+
+ 
+
+Follow up: Could you write a generalized algorithm to work on any
+possible set of characters?
+"""
+
+class Codec:
+    def encode(self, strs: List[str]) -> str:
+        """Encodes a list of strings to a single string.
+        """
+        
+
+    def decode(self, s: str) -> List[str]:
+        """Decodes a single string to a list of strings.
+        """
+        
+
+
+# Your Codec object will be instantiated and called as such:
+# codec = Codec()
+# codec.decode(codec.encode(strs))