Time: 106 ms (86.75%), Space: 19.9 MB (90.17%) - LeetHub

Author: hogan-tech

0320-generalized-abbreviation/0320-generalized-abbreviation.py

@@ -0,0 +1,42 @@
+# time complexity: O(2^n)
+# space complexity: O(n)
+from typing import List
+
+
+class Solution:
+    def storeAbbreviations(
+        self,
+        abbreviations: List[str],
+        word: str,
+        currWord: str,
+        index: int,
+        abbreviatedCount: int
+    ):
+        if index == len(word):
+            if abbreviatedCount > 0:
+                currWord += str(abbreviatedCount)
+            abbreviations.append(currWord)
+            return
+
+        self.storeAbbreviations(
+            abbreviations,
+            word,
+            currWord
+            + (str(abbreviatedCount) if abbreviatedCount > 0 else "")
+            + word[index],
+            index + 1,
+            0
+        )
+
+        self.storeAbbreviations(
+            abbreviations, word, currWord, index + 1, abbreviatedCount + 1
+        )
+
+    def generateAbbreviations(self, word: str) -> List[str]:
+        abbreviations = []
+        self.storeAbbreviations(abbreviations, word, "", 0, 0)
+        return abbreviations
+
+
+word = "word"
+print(Solution().generateAbbreviations(word))