/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

1 vote115 views1 answer
How to input 2-d array in python
Python
0 vote91 views1 answer
Os.system ignore output
Python
31 votes100 views3 answers
How to adda vaslues to data frame
Python
0 vote98 views1 answer
Assert with message python
Python
0 vote102 views1 answer
Faster way to find list of unique elements in a list
Python
-1 vote108 views1 answer
Groupby where only
Python
2 votes103 views1 answer
Arctan calculator
Python
0 vote94 views1 answer
Moving averages python
Python
0 vote114 views1 answer
Ascii program
Python
0 vote110 views1 answer
Reason: Worker failed to boot
Python