Create: 0049-group-anagrams.dart

Author: NikSWE

dart/0049-group-anagrams.dart

@@ -0,0 +1,23 @@
+// Time Complexity: O(n * m)
+// Space Complexity: O(n * m)
+
+class Solution {
+  List<List<String>> groupAnagrams(List<String> strs) {
+    var map = Map<String, List<String>>();
+    
+    for (var str in strs) {
+      var count = List.filled(26, 0);
+      for (int i = 0; i < str.length; i++) {
+        count[str[i].codeUnitAt(0) - 'a'.codeUnitAt(0)]++;
+      }
+      var key = count.join("#");
+      if (map.containsKey(key)) {
+        map[key]!.add(str);
+        continue;
+      }
+      map[key] = [str];
+    }
+
+    return List.from(map.values);
+  }
+}