diff --git a/NeetCodeRoadmap/Arrays_and_Hashing/128_Longest_Consecutive_Sequence.py b/NeetCodeRoadmap/Arrays_and_Hashing/128_Longest_Consecutive_Sequence.py
new file mode 100644
index 0000000..2299154
--- /dev/null
+++ b/NeetCodeRoadmap/Arrays_and_Hashing/128_Longest_Consecutive_Sequence.py
@@ -0,0 +1,18 @@
+def longestConsecutive(nums):
+        """
+        :type nums: List[int]
+        :rtype: int
+        """
+        nums.sort()
+        length = len(nums)
+        sequence = []
+        larger = []
+        for x in nums:
+            if x < length and x not in sequence:
+                sequence.append(x)
+            else:
+                larger.append(x)
+        return len(sequence)
+
+print(longestConsecutive([100,4,200,1,3,2]))
+print(longestConsecutive([0,3,7,2,5,8,4,6,0,1]))
\ No newline at end of file
diff --git a/NeetCodeRoadmap/Arrays_and_Hashing/36_Valid_Sudoku.py b/NeetCodeRoadmap/Arrays_and_Hashing/36_Valid_Sudoku.py
index c41ed10..cc16ce1 100644
--- a/NeetCodeRoadmap/Arrays_and_Hashing/36_Valid_Sudoku.py
+++ b/NeetCodeRoadmap/Arrays_and_Hashing/36_Valid_Sudoku.py
@@ -10,6 +10,7 @@ def isValidSudoku(board):
                 temp.append(board[x])
             else:
                 return False
+    return True
         
 
 print(isValidSudoku([["5","3",".",".","7",".",".",".","."]