diff --git a/findminmax.py b/findminmax.py
new file mode 100644
index 00000000..7c3221e5
--- /dev/null
+++ b/findminmax.py
@@ -0,0 +1,34 @@
+# // Time Complexity : O(n)
+# // Space Complexity : O(1)
+# // Did this code successfully run on GeeksForGeeks : Yes
+# // Any problem you faced while coding this : No
+
+class Solution:
+    def getMinMax(self, arr):
+        # code here
+        n=len(arr)
+        if n%2==0:
+            start=2            
+            if arr[0]>arr[1]:
+                min_e=arr[1]
+                max_e=arr[0]
+            else:
+                min_e=arr[0]
+                max_e=arr[1]
+        else:
+            start=1
+            min_e=arr[0]
+            max_e=arr[0]
+            
+        i=start
+        while(i<n):
+            if (arr[i]>arr[i+1]):
+                min_e=min(min_e,arr[i+1])
+                max_e=max(max_e,arr[i])
+            else:
+                min_e=min(min_e,arr[i])
+                max_e=max(max_e,arr[i+1])
+            i+=2
+        
+        
+        return [min_e,max_e]
\ No newline at end of file
diff --git a/findmissing.py b/findmissing.py
new file mode 100644
index 00000000..9ed5af49
--- /dev/null
+++ b/findmissing.py
@@ -0,0 +1,25 @@
+# // Time Complexity : O(n)
+# // Space Complexity : O(1)
+# // Did this code successfully run on Leetcode : Yes
+# // Any problem you faced while coding this : No
+
+class Solution(object):
+    def findDisappearedNumbers(self, nums):
+        """
+        :type nums: List[int]
+        :rtype: List[int]
+        """
+        n=len(nums)
+        res=[]
+        
+        for i in range(n):
+            ind = abs(nums[i])-1
+            if nums[ind]>0:
+                nums[ind]*=-1
+
+        for i in range(n):
+            if nums[i]>0:
+                res.append(i+1)
+            
+
+        return res
\ No newline at end of file
diff --git a/gameOfLife.py b/gameOfLife.py
new file mode 100644
index 00000000..4127e64c
--- /dev/null
+++ b/gameOfLife.py
@@ -0,0 +1,39 @@
+# // Time Complexity : O(m*n)
+# // Space Complexity : O(1)
+# // Did this code successfully run on Leetcode : Yes
+# // Any problem you faced while coding this : NA
+#   
+class Solution(object):
+    def gameOfLife(self, board):
+        """
+        :type board: List[List[int]]
+        :rtype: None Do not return anything, modify board in-place instead.
+        """
+        res=board
+        m=len(board)
+        n=len(board[0])
+        surround=[(0,-1),(-1,-1),(-1,0),(-1,1),(0,1),(1,1),(1,0),(1,-1)]
+
+        for i in range(m):
+            for j in range(n):
+                live_around=0
+                for s in surround:
+                    r=i+s[0]
+                    c=j+s[1]
+
+                    if r<m and r>=0 and c<n and c>=0 and abs(board[r][c])==1:
+                        live_around+=1
+                    
+                if board[i][j]==0 and live_around==3:
+                    board[i][j]=2
+                
+                if board[i][j]==1 and (live_around>3 or live_around<2):
+                    board[i][j]*=-1
+
+        for i in range(m):
+            for j in range(n):
+                if board[i][j]<=0:
+                    board[i][j]=0
+                else:
+                    board[i][j]=1
+