/Python/Stickler Thief or Maximum sum such that no two elements are adjacent

Stickler Thief or Maximum sum such that no two elements are adjacent

Recursion :
def FindMaxSum(arr, n):
        
    def recur(arr, n):
        
        if n == 1:
            return arr[n-1]
        
        if n == 2:
            return max(arr[n-1], arr[n-2])
        
        return max(recur(arr, n-1), recur(arr, n-2) + arr[n-1])
    
    return recur(arr, n)
 
Top Down :
def FindMaxSum(arr, n):
        
    def top_down(arr, n, dp):
        
        if dp[n] != -1:
            return dp[n]
    
        dp[n] =  max(top_down(arr, n-1, dp), top_down(arr, n-2, dp) + arr[n-1])
        
        return dp[n]
    
    if n == 1:
        return arr[0]
    if n == 2:
        return max(arr[0], arr[1])
        
    dp =[-1 for i in range(n+1)]
    dp[1] = arr[0]
    dp[2] = max(arr[0], arr[1])
    
    return top_down(arr, n, dp)
  
Bottom Up :
def FindMaxSum(arr, n):
        
    def bottom_up(arr, n, dp):
        
        for i in range(2, n):
            dp[i] =  max(dp[i-1], dp[i-2] + arr[i])

    if n == 1:
        return arr[0]
    if n == 2:
        return max(arr[0], arr[1])
        
    dp =[0 for i in range(n)]
    dp[0] = arr[0]
    dp[1] = max(arr[0], arr[1])
    
    bottom_up(arr, n, dp)
    
    return dp[n-1]

Source: practice.geeksforgeeks.org

Similar codes

7 votes360 views2 answers
Save a text file from web python
Python
0 vote370 views1 answer
Tuple plot python
Python
0 vote341 views1 answer
Polish notation python
Python
3 votes411 views2 answers
Django rest framework simple jwt
Python
1 vote352 views2 answers
Matplotlib display graph on jupyter notebook
Python
0 vote339 views1 answer
Spreadsheet worksheet counter
Python
45 votes373 views3 answers
Git repository
Python
0 vote355 views1 answer
How to remove some lines border from plt plot
Python
0 vote330 views1 answer
Aiohttp specify app IP
Python
0 vote343 views1 answer
How to join models from another app
Python