diff --git a/Find all numbers disappeared in Array.py b/Find all numbers disappeared in Array.py
new file mode 100644
index 00000000..05b72bca
--- /dev/null
+++ b/Find all numbers disappeared in Array.py	
@@ -0,0 +1,14 @@
+class Solution:
+    def findDisappearedNumbers(self, nums: List[int]) -> List[int]:
+        n=len(nums)
+        result=[]
+        for i in range(len(nums)):
+            if nums[abs(nums[i])-1]>0:
+                nums[abs(nums[i])-1]=nums[abs(nums[i])-1]*-1
+        
+        for i in range(len(nums)):
+            if nums[i]>0:
+                result.append(i+1)
+            else:
+                nums[i]=nums[i]*-1
+        return result
\ No newline at end of file
diff --git a/Game of Life.py b/Game of Life.py
new file mode 100644
index 00000000..9c7fc8f5
--- /dev/null
+++ b/Game of Life.py	
@@ -0,0 +1,39 @@
+class Solution:
+    def gameOfLife(self, board: List[List[int]]) -> None:
+        """
+        Do not return anything, modify board in-place instead.
+        """
+        m=len(board)
+        n=len(board[0])
+
+        #1-0 ->2
+        #0-1-> 3
+        for i in range(m):
+            for j in range(n):
+                countn=self.neighbourCount(board, i , j)
+                if board[i][j]==1:
+                    if countn<2 or countn>3:
+                        board[i][j]=2
+
+                else:
+                    if countn==3:
+                        board[i][j]=3
+        for i in range(m):
+            for j in range(n):
+                if board[i][j]==2:
+                    board[i][j]=0
+                elif board[i][j]==3:
+                    board[i][j]=1
+    def neighbourCount( self,board: List[List[int]], r: int, c:int)->int:
+        count=0
+        m=len(board)
+        n=len(board[0])
+
+        dirr=[[-1,-1],[-1,0],[-1,1],[0,1],[1,1],[1,0],[1,-1],[0,-1]]
+        for dir in dirr:
+            nr=r+dir[0]
+            nc=c+dir[1]
+
+            if nr>=0 and nc>=0 and nr<m and nc<n and (board[nr][nc]==1 or board[nr][nc]==2):
+                count=count+1
+        return count
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