In python 3 Simple Iterative As we in general, try to solve the problem
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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In python 3
Simple Iterative
As we in general, try to solve the problem first; we start with a brute force, simple,
![Divide and Conquer
Now, we would try to use a divide and conquer paradigm. Hint: try the three steps, and design multiple versions to master these steps
# write your implementation here
def maxProfit(changes):
This is just an interface for <maxProfitDivide>
it returns the indices of (i,j) indicating the day to buy and sell respectively
to have the maximum profit in a list of prices per day in <changes>.
Inputs:
- changes: the list holding the changes in prices; the value whose index is k represents
the change between day <k> and day <k+1>
<changes> has at least a single change [two days]
Output:
- i: the index of the change before which we buy
- j: the index of the change after which we sell
maxProfit: the value of the maximum profit
return (0,0,0)
maxProfit([13,7,-30,15,10,-5,12,7,-11,6])](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F249411fb-17e6-4b4c-8be8-accd9a7fc6a1%2F80b1a658-1c60-49b0-b508-26a45f40c96d%2Fbx8dkt7_processed.png&w=3840&q=75)
Transcribed Image Text:Divide and Conquer
Now, we would try to use a divide and conquer paradigm. Hint: try the three steps, and design multiple versions to master these steps
# write your implementation here
def maxProfit(changes):
This is just an interface for <maxProfitDivide>
it returns the indices of (i,j) indicating the day to buy and sell respectively
to have the maximum profit in a list of prices per day in <changes>.
Inputs:
- changes: the list holding the changes in prices; the value whose index is k represents
the change between day <k> and day <k+1>
<changes> has at least a single change [two days]
Output:
- i: the index of the change before which we buy
- j: the index of the change after which we sell
maxProfit: the value of the maximum profit
return (0,0,0)
maxProfit([13,7,-30,15,10,-5,12,7,-11,6])
![# write your implementation here
def maxProfitBrute(changes):
it returns the indices of (i,j) indicating the day to buy and sell respectively
to have the maximum profit in a list of prices per day in <changes>.
Inputs:
- changes: the list holding the changes in prices; the value whose index is k represents
the change between day <k> and day <k+1>
<changes> has at least a single change [two days]
Output:
- i: the index of the change before which we buy
j: the index of the change after which we sell
- maxProfit: the value of the maximum profit
Example:
changes = [1,2]
- that means the price started with <x>;
- day 1: it became <X+1>
- day 2: it became <X+3>
In that case: (i,j) = (0,1) as we should buy at the first day, and sell after the third day
# return the values
return (0,0,e)
# Try your algorithm
maxProfitBrute([13,7,-30,15,10, -5,12,7, -11,6])](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F249411fb-17e6-4b4c-8be8-accd9a7fc6a1%2F80b1a658-1c60-49b0-b508-26a45f40c96d%2Fmdx317h_processed.png&w=3840&q=75)
Transcribed Image Text:# write your implementation here
def maxProfitBrute(changes):
it returns the indices of (i,j) indicating the day to buy and sell respectively
to have the maximum profit in a list of prices per day in <changes>.
Inputs:
- changes: the list holding the changes in prices; the value whose index is k represents
the change between day <k> and day <k+1>
<changes> has at least a single change [two days]
Output:
- i: the index of the change before which we buy
j: the index of the change after which we sell
- maxProfit: the value of the maximum profit
Example:
changes = [1,2]
- that means the price started with <x>;
- day 1: it became <X+1>
- day 2: it became <X+3>
In that case: (i,j) = (0,1) as we should buy at the first day, and sell after the third day
# return the values
return (0,0,e)
# Try your algorithm
maxProfitBrute([13,7,-30,15,10, -5,12,7, -11,6])
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