Wolves of Wall Street - Amazon Top Interview Questions
Problem Statement :
Given a list of integers prices representing the stock prices of a company in chronological order, return the maximum profit you could have made from buying and selling that stock any number of times. You must buy before you can sell it. But you are not required to buy or sell the stock. Constraints 0 ≤ n ≤ 100,000 where n is the length of prices Example 1 Input prices = [1, 5, 3, 4, 6] Output 7 Explanation We can buy at 1, sell at 5, buy at 3, and sell at 6.
Solution :
Solution in C++ :
int solve(vector<int>& prices) {
int profit = 0;
for(int i=0; i<prices.size(); i++){
int buy = prices[i];
while(prices[i] <= prices[i+1] && i+1 < prices.size())
i++;
profit += prices[i] - buy;
}
return profit;
}
Solution in Java :
import java.util.*;
class Solution {
public int solve(int[] prices) {
int diff = 0;
for (int i = 0; i < prices.length - 1; i++) {
if (prices[i] < prices[i + 1])
diff = diff + prices[i + 1] - prices[i];
}
return diff;
}
}
Solution in Python :
class Solution:
def solve(self, prices):
prev_price, profit = float("inf"), 0
for p in prices:
if p > prev_price:
profit += p - prev_price
prev_price = p
return profit
View More Similar Problems
Tree: Preorder Traversal
Complete the preorder function in the editor below, which has 1 parameter: a pointer to the root of a binary tree. It must print the values in the tree's preorder traversal as a single line of space-separated values. Input Format Our test code passes the root node of a binary tree to the preOrder function. Constraints 1 <= Nodes in the tree <= 500 Output Format Print the tree's
View Solution →Tree: Postorder Traversal
Complete the postorder function in the editor below. It received 1 parameter: a pointer to the root of a binary tree. It must print the values in the tree's postorder traversal as a single line of space-separated values. Input Format Our test code passes the root node of a binary tree to the postorder function. Constraints 1 <= Nodes in the tree <= 500 Output Format Print the
View Solution →Tree: Inorder Traversal
In this challenge, you are required to implement inorder traversal of a tree. Complete the inorder function in your editor below, which has 1 parameter: a pointer to the root of a binary tree. It must print the values in the tree's inorder traversal as a single line of space-separated values. Input Format Our hidden tester code passes the root node of a binary tree to your $inOrder* func
View Solution →Tree: Height of a Binary Tree
The height of a binary tree is the number of edges between the tree's root and its furthest leaf. For example, the following binary tree is of height : image Function Description Complete the getHeight or height function in the editor. It must return the height of a binary tree as an integer. getHeight or height has the following parameter(s): root: a reference to the root of a binary
View Solution →Tree : Top View
Given a pointer to the root of a binary tree, print the top view of the binary tree. The tree as seen from the top the nodes, is called the top view of the tree. For example : 1 \ 2 \ 5 / \ 3 6 \ 4 Top View : 1 -> 2 -> 5 -> 6 Complete the function topView and print the resulting values on a single line separated by space.
View Solution →Tree: Level Order Traversal
Given a pointer to the root of a binary tree, you need to print the level order traversal of this tree. In level-order traversal, nodes are visited level by level from left to right. Complete the function levelOrder and print the values in a single line separated by a space. For example: 1 \ 2 \ 5 / \ 3 6 \ 4 F
View Solution →