From 5551dcc4fefb8c2aa64cd1277f0751c8972807a0 Mon Sep 17 00:00:00 2001
From: ImAlpha <arcticjcb@gmail.com>
Date: Thu, 7 Sep 2023 20:07:43 -0700
Subject: [PATCH] O(m*nlogn) solution

---
 .../Arrays_and_Hashing/49_Group_Anagrams.py   | 53 +++++--------------
 1 file changed, 12 insertions(+), 41 deletions(-)

diff --git a/NeetCodeRoadmap/Arrays_and_Hashing/49_Group_Anagrams.py b/NeetCodeRoadmap/Arrays_and_Hashing/49_Group_Anagrams.py
index 813d369..5a77050 100644
--- a/NeetCodeRoadmap/Arrays_and_Hashing/49_Group_Anagrams.py
+++ b/NeetCodeRoadmap/Arrays_and_Hashing/49_Group_Anagrams.py
@@ -1,50 +1,21 @@
-def validAnagram(s: str, t: str) -> bool:
-        seen = {}
-        check = {}
-        count = 0
-        for letter in s:
-                if letter in seen:
-                        seen[letter] += 1
-                else:
-                        seen[letter] = 1
-        for letter in t:
-                if letter in check:
-                        check[letter] += 1
-                else:
-                        check[letter] = 1
-        if seen != check:
-                return False
-        else:
-                return True
-
-
 def groupAnagrams(strs: list[str])->list[str]:
         """
         :type strs: List[str]
         :rtype: List[List[str]]
         """
-        final = []
-        seen = []
-        # Fill first list with matching anagrams
-        for i in range(len(strs)):
-                grouped = []
-                print(f'i is: {strs[i]}')
-                if i == len(strs)-1 and strs[i] not in grouped:
-                        grouped.append(strs[i])
-                for j in range(i+1, len(strs)):
-                        print(f'j is: {strs[j]}')
-                        if validAnagram(strs[i], strs[j]) == True:
-                                if strs[i] not in grouped and strs[i] not in seen:
-                                        grouped.append(strs[i])
-                                        seen.append(strs[i])
-                                if strs[j] not in grouped and strs[j] not in seen:
-                                        grouped.append(strs[j])
-                                        seen.append(strs[j])
-                if grouped:
-                        final.append(grouped)
+        strs_table = {}
 
-        return final
+        for string in strs:
+                sorted_string = ''.join(sorted(string))
+
+                if sorted_string not in strs_table:
+                        strs_table[sorted_string] = []
+
+                strs_table[sorted_string].append(string)
+
+        return list(strs_table.values())
 
 
 
-print(groupAnagrams(["eat","tea","tan","ate","nat","bat"]))
\ No newline at end of file
+# print(groupAnagrams(["eat","tea","tan","ate","nat","bat"]))
+print(groupAnagrams(["",""]))
\ No newline at end of file