Easy. You have to pick one element from each list so that the … The stock span problem is a financial problem where we have a series of n daily price quotes for a stock and we need to calculate span of stock’s price for all n days. However I couldn't pass test cases and don't know why my solution is wrong. If you have any confusion just leave a comment below and I will try to make it clear for you. Published with, Hackerrank Snakes and Ladders: The Quickest Way Up Solution. Quite redundant in python, but that's mandatory in the question specs \$\endgroup\$ – snow Jul 4 '16 at 16:02. Matrix Hackerrank Solution Python Solutions to HackerRank and CodeChef problems that were written in Java & Python. I found this page around 2014 and after then I exercise my brain for FUN. The first line contains the number of test cases .eval(ez_write_tag([[468,60],'thepoorcoder_com-box-3','ezslot_1',102,'0','0'])); Each of the next  pairs of lines contain:- The first line contains an integer , the number of predicted prices for WOT.- The next line contains n space-separated integers , each a predicted stock price for day . 7. The first line contains 2 space separated integers K and M.The next K lines each contains an integer Ni, denoting the number of elements in the ith list, followed by Ni space separated integers denoting the elements in the list.eval(ez_write_tag([[468,60],'thepoorcoder_com-box-3','ezslot_10',102,'0','0'])); Output a single integer denoting the value Smax. Your algorithms have become so good at predicting the market that can predict the share price of Wooden Orange Toothpicks Inc. - The next line contains n space-separated integers , each a predicted stock price for day . Now we just have to sum the difference between the values in maxarr and prices list, © 2020 The Poor Coder | Hackerrank Solutions - Some are in C++, Rust and GoLang. Sock Merchant - Hacker Rank Solution To solve this challenge, we go through each color and count its frequency, . eval(ez_write_tag([[580,400],'thepoorcoder_com-medrectangle-3','ezslot_4',103,'0','0']));Sample Input. .MathJax_SVG_Display {text-align: center; margin: 1em 0em; position: relative; display: block!important; text-indent: 0; max-width: none; max-height: none; min-width: 0; min-height: 0; width: 100%} .MathJax_SVG .MJX-monospace {font-family: monospace} .MathJax_SVG .MJX-sans-serif {font-family: sans-serif} .MathJax_SVG {display: inline; font-style: normal; font-weight: normal; line-height: normal; font-size: 100%; font-size-adjust: none; text-indent: Hackerrank Breadth First Search: Shortest Reach Solution. HackerRank Solutions in Python3. Here’s the code solution for the approach mentioned above. Click that :) It’ll take you to this (screenshot below). If they are instead , no profit can be made so you don't buy or sell stock those days. Find the maximized value Smax obtained. For example, if the given array is {100, 180, 260, 310, 40, 535, 695}, the maximum profit can earned by buying on day 0, selling on day 3. Hackerrank is a site where you can test your programming skills and learn something new in many domains. Hackerrank - Stock Maximize Solution Beeze Aal 06.Jul.2020 Your algorithms have become so good at predicting the market that you now know what the share price of Wooden Orange Toothpicks Inc. (WOT) will be for the next number of days. Say you have an array for which the i th element is the price of a given stock on day i. And if the price in the next day is lesser than current day, I sell already bought shares at current rate. For example, if you know that prices for the next two days are , you should buy one share day one, and sell it day two for a profit of . Solution to Sock Merchant problem on Hackerrank's Interview Preparation kit warm-up challenge. * Function to pre-process the stock price array and find the days on which * we should sell shares to get maximum profit This pre-processing helps us * to solve this problem in O(n) time * * @param stockPrices * : array of stock prices for different days * @param days * : the number of days for which we have stock … You have to pick one element from each list so that the value from the equation below is maximized: You are given a function f(X) = X2. Where anger co-efficient, D = max of chosen K numbers - min of chosen K numbers. We can do this by iterating from backwards. We use map and split function to convert the row input into list of integers. First of all as we have given an array 3 3 9 9 5, find the prefix_sum[i]%m. Now the following gives us all the possible ways of picking K numbers from our nums variable, Now our task is to sum each list and find the remainder after diving by M. For which we will use lambda, sum and map function. There is a tab called “Leaderboard”. Each day, you can either buy one share of WOT, sell any number of shares of WOT that you own, or not make any transaction at all. Traverse from index 0 through n. If the price in the next day is more than current day, I buy shares. Discuss (999+) Submissions. If future prices are smaller). The ith list consists of Ni elements. See the original problem on HackerRank. In Day 1, we will get familiar with the primitive data types. 6673 288 Add to List Share. Try solving it yourself! Then we use [1:] to slice out the first number of each row because it is actually the count of items in that row and we don't need it. Hackerrank - Iterables and Iterators Solution The itertools module standardizes a core set of fast, memory efficient tools that are useful by themselves or in combination. My solutions of Hackerrank Python Domain challenges. It must return an integer that represents the maximum profit achievable. 'Solutions for HackerRank 30 Day Challenge in Python.' Given the stock price of n days, the trader is allowed to make at most k transactions, where a new transaction can only start after the previous transaction is complete, find out the maximum profit that a share trader could have made. Simple Max Difference In securities research, an analyst will look at a number of attributes for a stock. The first line contains the number of test cases .. Each of the next pairs of lines contain: - The first line contains an integer , the number of predicted prices for WOT. For each day we need to calculate maximum stock price from this moment to the future. The list consists of elements. Stock Maximize. The maximum value that you can obtain, will be the answer to the problem. You are given a function . The page is a good start for people to solve these problems as the time constraints are rather forgiving. eval(ez_write_tag([[580,400],'thepoorcoder_com-medrectangle-4','ezslot_3',104,'0','0']));For the first case, you cannot obtain any profit because the share price never rises.For the second case, you can buy one share on the first two days and sell both of them on the third day.For the third case, you can buy one share on day 1, sell one on day 2, buy one share on day 3, and sell one share on day 4. In Day 15, we will look at understanding scope. Take a look at this beginner problem - Solve Me First. A good strategy consists in selling one share only if that increases someday in the future. If you have better code (I like readable code rather than short liner), send pull request. Solution. Once we've calculated all the frequencies, we calculate the number of pairs of each kind of sock as (using integer division). Given a list containing future prediction of share prices, find maximum profit that can be earned by buying and selling shares any number of times with constraint that a new transaction can only start after previous transaction is complete. Let's use the max function for finding the biggest number. The list consists of elements. Your algorithms have become so good at predicting the market that you now know what the share price of Wooden Orange Toothpicks Inc. (WOT) will be for the next number of days. Output  lines, each containing the maximum profit which can be obtained for the corresponding test case. My Hackerrank profile. Picking 5 from the 1st list, 9 from the 2nd list and 10 from the 3rd list gives the maximum S value equal to (52 + 92 + 10 2)%1000 =206. 2 5 4 means we have 2 numbers in our row and 5,4 are the required numbers,  3 7 8 9 means we have 3 numbers in our row and 7,8,9 are the required numbers and so and so, eval(ez_write_tag([[300,250],'thepoorcoder_com-box-4','ezslot_1',108,'0','0']));As required by the question we square and find the remainder(or we can say modulus) after diving the squared number by M for each numbers in the row and then we append that list to nums variable. In this series, I will walk you through Hacker Rank’s 30 days of code challenge day by day. ... HackerRank-Solutions / Algorithms / Dynamic Programming / Stock Maximize.cpp Go to file Go to file T; Go to line L; Copy path Blake Brown Update file structure. In this series, I will walk you through Hacker Rank’s 30 days of code challenge day by day. Here is the code You have to pick one element from each list so that the value from the equation below is maximized: Xi denotes the element picked from the ith list . Let us assume we have the following prices, Our goal is to create another array which holds maximum price of the future (including current day, we can buy and sell the same day. ***Solution to Day 19 skipped, because Pyhton implementation was not available at the time of completion. eval(ez_write_tag([[580,400],'thepoorcoder_com-medrectangle-4','ezslot_2',104,'0','0']));Before we get started, we must know that the follow 2 gives us equal results, (52 %1000 + 92 %1000 + 10 2 %1000) =206%1000 = 206, Also we should know the following python functions, The following code takes the value of K (no. In the above example i have added a list function just for unpacking the values inside the map function. You are also given lists. The codes may give a head start if you are stuck somewhere! What is the maximum profit you can obtain with an optimum trading strategy? 1 \$\begingroup\$ @snow actually, its better for a question to contain everything by itself. Hackerrank Solutions. Complete the stockmax function in the editor below. One analyst would like to keep a record of the highest positive spread between a closing price and the closing price on any prior day in history. My public HackerRank profile here. You are also given K lists. Stock-Prediction – he just sold stocks that had gone up and bought ones that had gone down, making \$80k in the process. eval(ez_write_tag([[300,250],'thepoorcoder_com-banner-1','ezslot_8',109,'0','0']));And here you go, the greatest number of this list is our answer. The majority of the solutions are in Python 2. Best Time to Buy and Sell Stock. You are also given lists. I created almost all solutions in 4 programming languages - Scala, Javascript, Java and Ruby. of rows) and M(modulus) from the user and convert both values to integer using map() function, Then we create an empty list and name it nums, and we loop K(no. comment. Hackerrank - Maximize It! Problem description: hackerrank. Max Min - Hacker Rank Solution In this problem, we are given a list of numbers, out of which numbers are to be chosen such that the difference between max and min of numbers is minimized. which will be 3 6 1 3 1. 121. Solutions. If you have already attempted the problem (solved it), you can access others code. Bead Ornaments – he figured out a formula to solve the code in only a few lined of Python. of row ) times. Over the course of the next few (actually many) days, I will be posting the solutions to previous Hacker Rank challenges. Instead of trying to read in three lines of stock costs when there is actually only one line of three space-separated costs, you need to read in that one line and split it into a list of integers, for example like this (since it looks like you're using Python 3): stocks = list(map(int, input().split(" "))) Code Solution. Solution. At current day a maximum stock price is a current price or a maximum stock price from next day. ***Solution to Day 21 skipped, because Python implementation was not available at the time of completion. However our code works without unpacking the values. Improve your coding skills with our library of 300+ challenges and prepare for coding interviews with content from leading technology companies. You add the squares of the chosen elements and perform the modulo operation. © 2020 The Poor Coder | Hackerrank Solutions - Note that you need to take exactly one element from each list, not necessarily the largest element. The solution has been provided in Java, C++ and C. Sock Merchant: Java Code Solution .MathJax_SVG_Display {text-align: center; margin: 1em 0em; position: relative; display: block!important; text-indent: 0; max-width: none; max-height: none; min-width: 0; min-height: 0; width: 100%} .MathJax_SVG .MJX-monospace {font-family: monospace} .MathJax_SVG .MJX-sans-serif {font-family: sans-serif} .MathJax_SVG {display: inline; font-style: normal; font-weight: normal; line-height: normal; font-size: 100%; font-size-adjust: none; text-indent: Hackerrank Breadth First Search: Shortest Reach Solution. Only the code snippet of the function has been provided below, that you can paste in HackerRank editor below the // Complete the sockMerchant function below. The best time to sell it corresponds to highest price reached after the day we buy the stock. i.e. Contribute to BlakeBrown/HackerRank-Solutions development by creating an account on GitHub. Contribute to yznpku/HackerRank development by creating an account on GitHub. The cost of a stock on each day is given in an array, find the max profit that you can make by buying and selling in those days. Stone Game – he just used a brute-force solution, but that only passed two test cases. eval(ez_write_tag([[580,400],'thepoorcoder_com-medrectangle-3','ezslot_7',103,'0','0']));Explanation. we can only hold at-most one share at a time. You are given a function . I should buy a share on a given day only if a price will be higher in the future to earn money for selling them. Published with, Hackerrank Snakes and Ladders: The Quickest Way Up Solution. The codes may give a head start if you are stuck somewhere! In share trading, a buyer buys shares and sells on a future date. Latest commit 8594a80 Jun 13, 2016 History. Together, they form an iterator algebra making it possible to construct specialized tools succinctly and efficiently in pure Python.