python and algorithims. Divide and ConquerNow, we would try to use a divide and conquer paradigm. Hint: try the three steps, and design multiple versions to master these stepsIn [ ]: # urite your implementation heredef maxProfit(changes):This is just an interface for it returns the indices of (i,j) indicating the day to buy and sell respectivelyto have the maximum profit in a list of prices per day in .Inputs:- changes: the list holding the changes in prices; the value whose index is k representsthe change between day and day has at least a single change [two days]Output:- i: the index of the change before which we buyj: the index of the change after which we sellmaxProfit: the value of the maximun profitreturn (e,e,0)In [ ]: maxProfit([13,7, -30,15, 18,-5,12,7,-11,6])Empirical AnalysisNow, compare between the growth rate of the two algorithmsIn [ ]: # feel free to import what you wantSnatplotlib inlineimport matplotlibimport matplotlib.pyplot as pltimport timeIn [ ]: # recording the time for various callsIn [ ]: # the code to plot the curveTheoretical Analysis Simple IterativeAs we in general, try to solve the problem first; we start with a brute force, simple, algorithm: design it belowIn [ ]: # urite your implementation heredef maxProfitBrute(changes) :it returns the indices of (i,j) indicating the day to buy and sell respectivelyto have the maximum profit in a list of prices per day in .Inputs:- changes: the list holding the changes in prices; the value whose index is k representsthe change between day and day 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 maximun profitExample:changes = [1,2]- that means the price started with ;day 1: it became - day 2: it became In that case: (i,j) = (8,1) as we should buy at the first day, and sell after the third day# return the valuesreturn (e,e,e)In [ ]: # Try your algorithmmaxProfitBrute ([13,7,-30,15,10, -5,12,7,-11,6])

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Description: python and algorithims. Divide and ConquerNow, we would try to use a divide and conquer paradigm. Hint: try the three steps, and design multiple versions to master these stepsIn [ ]: # urite your implementation heredef maxProfit(changes):This is just

Answered: python and algorithims.

Engineering

Computer Science

python and algorithims.

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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During tough times like these, investment becomes more uncertain with more dangers. To solve it, we might try to train a model to decide when to buy or sell. Therefore, to provide it with correct data, we plan to design an algorithm that answers: what is the perfect moment to buy and when to sell to maximize your profit? Assume you must buy Input: changes : array listing changes in the prices, where indices represent days; it has at least two values Output: i : index of the change before which we buy j: index of the change before which we sell maxProfit : the profit of this interval Example: Assume the below table contains the prices of a particular stock over days prices changes Day Value 50 1 63 13 70 7 3 40 -30 55 15 65 10 6 60 -5 7 72 12 8 79 7 9 68 -11 10 74 6 Therefore, the output of maxProfit([13,7,-30,15,10, -5,12,7, -11,6]) should be (3, 7, 39) . This is because our maximum profit would be 39 when we buy the stock at day 4, index of 3, and sell after day 8, index of 7. Then,…
1. Analyze the word finder with wild card characters scenario to form the algorithm and compute the time complexity. You are given a list of characters with size n, m. You need to read character data provided as input into this list. There is also a list of p words that you need to find in the given problem. You can only search in left, right, up and down direction from a position. There are two wild characters *' and '+' ,if there is any instance of wild card characters for example '+' appears you can match whatever character in your word that you are searching at this position (only one character). Similarly, if you got wildcard *' you can skip any number of characters ( A sequence of characters not necessary same in between the characters) but the last character should be matched in the given data. This means you are not allowed to match a first and last character with *' wildeard. Input: The first line of the input will give you two integers n and m. From the next line you will get…
The Fibonacci sequence begins with 0 and then 1 follows. All subsequent values are the sum of the previous two, for example: 0, 1, 1, 2, 3, 5, 8, 13. Complete the fibonacci() function, which takes in an index, n, and returns the nth value in the sequence. Any negative index values should return -1 Ex: If the input is: 7 the output is: fibonacci (7) is l3 Note: Use recursion and DO NOT use any loops.
In computer science and mathematics, the Josephus Problem (or Josephus permutation) is a theoretical problem. Following is the problem statement: There are n people standing in a circle waiting to be executed. The counting out begins at some point (rear) in the circle and proceeds around the circle in a fixed direction. In each step, a certain number (k) of people are skipped and the next person is executed. The elimination proceeds around the circle (which is becoming smaller and smaller as the executed people are removed), until only the last person remains, who is given freedom. Given the total number of persons n and a number k which indicates that k-1 persons are skipped and kth person is killed in circle. The task is to choose the place in the initial circle so that you are the last one remaining and so survive. For example, if n = 5 and k = 2, then the safe position is 3. Firstly, the person at position 2 is killed, then person at position 4 is killed, then person at position 1…
The Fibonacci sequence begins with O and then 1 follows. All subsequent values are the sum of the previous two, for example: 0, 1, 1, 2, 3, 5, 8, 13. Complete the Fibonacci() function, which has an index n as a parameter and returns the nth value in the sequence. Any negative index values should return -1. Ex: If the input is: 7 the output is: Fibonacci (7) is 13 Note: Use a for loop and DO NOT use recursion. 1 #include NM in N 2 3 int Fibonacci(int n) { 4 /* Type your code here. */ 5} 6 7 int main(void) { 8 int startNum; 9 scanf("%d", &startNum); main.c 10 11 printf("Fibonacci (%d) is %d", startNum, Fibonacci (startNum)); return 0; 12 13 14
The Fibonacci sequence begins with 0 and then 1 follows. All subsequent values are the sum of the previous two, for example: 0, 1, 1, 2, 3, 5, 8, 13. Complete the Fibonacci() function, which has an index, n, as parameter and returns the nth value in the sequence. Any negative index values should return -1. Ex: If the input is: 7 the output is: Fibonacci(7) is 13 Note: Use a for loop and DO NOT use recursion.
Please help me Josephus Problem is a theoretical problem related to a certain counting-out game. On thiscase, people are standing in a circle waiting to be executed. After a specified number ofpeople are skipped, the next person is executed. The procedure is repeated with theremaining people, starting with the next person, going in the same direction and skippingthe same number of people, until one person remains, and is freed.Arrange the numbers 1 , 2, 3 , ... consecutively (say, clockwise) in a circle. Now removenumber 2 and proceed clockwise by removing every other number, among those thatremain, until one number is left. (a) Let denote the final number which remains. Find formula for .(b) If there are 70 people, what is the safe number (the number that remains)?
Solve using JAVA only Given a square chess board of size N, solve the N queens problem. ONLY Print out the NUMBER of solutions for a given N. DO NOT print out or produce the actual solutions, the code shold ONLY PROVIDE the number of correct solutions. Solve for N between 2 and 8. Try your program with 9 and 10, produce those results if it returns in a reasonable amount of time. The N queens problem is to find every configuration of N queens distributed on an NxN square chess board such that all queens are safe from attack by each other.
Correct answer will be upvoted else downvoted. Computer science. single activity, you should supplant each digit d of the number with the decimal portrayal of integer d+1. For instance, 1912 becomes 21023 in the wake of applying the activity once. You need to find the length of n subsequent to applying m tasks. Since the appropriate response can be exceptionally enormous, print it modulo 109+7. Input The main line contains a solitary integer t (1≤t≤2⋅105) — the number of experiments. The main line of each experiment contains two integers n (1≤n≤109) and m (1≤m≤2⋅105) — the underlying number and the number of activities. Output For each experiment output the length of the subsequent number modulo 109+7.
Given: List L of pairs of characters String S Output: TRUE if S is a valid string, FALSE otherwise. A string is considered valid if each character in the string can be paired with another character in the string, where the pair belongs to the input list L. Furthermore, two pairs cannot cross each other. In other words, a pair most completely enclose another, or be completely separate. Design and implement an efficient dynamic programming solution to this problem. Examples: Input L: (a b) (b c) (c d) (a a) Input S: aaba Output: True (pairs shown color-coded: aaba, “aa” fully encloses “ab”) Input L: (a b) (b c) (c d) (a a) Input S: abcaad Output: True (pairs shown color-coded: abcaad, “ab” is separate from the other pairs) Input L: (a b) (b c) (c d) (a a) Input S: acbd Output: False (acbd is not valid because the pairs cross each other.) Input L: (a b) (b c) (c d) (a a) Input S: aaac Output: False Could you please provide python implementation to this?
Must be new solution and run on GNU Common Lisp! Using Lisp, write a program that solves the Missionaries and Cannibals problem that uses a DFS( depth first search). It should use (mac start end). Start is the current state (which can be (3 3 l) and End is the goal state (which can be (0 0 r). This should output the sequences of moves needed to reach the end state from the start state. This should print nil if there is no solution. For example, the call should be something like this! Call: (mac '(3 3 l) '(0 0 r)) Output: ((3 3 l) (2 2 r) (3 2 l) (3 0 r) (3 1 l) (1 1 r) (2 2 l) (0 2 r) (0 3 l) (0 1 r) (1 1 l) (0 0 r))
Given: List L of pairs of characters String S Output: TRUE if S is a valid string, FALSE otherwise. A string is considered valid if each character in the string can be paired with another character in the string, where the pair belongs to the input list L. Furthermore, two pairs cannot cross each other. In other words, a pair most completely enclose another, or be completely separate. Design and implement an efficient dynamic programming solution to this problem. Examples: Input L: (a b) (b c) (c d) (a a) Input S: aaba Output: True (pairs shown color-coded: aaba, “aa” fully encloses “ab”) Input L: (a b) (b c) (c d) (a a) Input S: abcaad Output: True (pairs shown color-coded: abcaad, “ab” is separate from the other pairs) Input L: (a b) (b c) (c d) (a a) Input S: acbd Output: False (acbd is not valid because the pairs cross each other.) Input L: (a b) (b c) (c d) (a a) Input S: aaac Output: False