encode-and-decode-strings solution

Author: hyeri0903

encode-and-decode-strings/hyeri0903.py

@@ -0,0 +1,24 @@
+class Solution:
+    """
+    @param: strs: a list of strings
+    @return: encodes a list of strings to a single string.
+    """
+    def encode(self, strs: List[str]):
+        text = ""
+        for str in strs:
+            text += f"{len(str)}:{str}"
+        return text
+
+    """
+    @param: str: A string
+    @return: decodes a single string to a list of strings
+    """
+    def decode(self, s: str):
+        output = []
+        start = 0
+        while start < len(s):
+            mid = s.find(":", start)
+            length = int(s[start:mid])
+            output.append(s[mid + 1 : mid + 1 + length])
+            start = mid + 1 + length
+        return output