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Problem

Submissions

Best time to buy and sell stock II

Contributed by

Ratnesh

Medium

0/80

0 upvotes

Problem Statement

You are given an array of integers, 'PRICES' of size 'N', where 'PRICES[i]' is the price of a given stock on 'i'th day.

Return the maximum profit you can achieve.

Note: You can't sell a stock before you buy one.

Example:

Let's say, 'PRICES' = [7, 1, 5, 4, 3, 6]

Purchase stock on day two, where the price is one, and sell it on day three, where the price is five, profit = 5 - 1 = 4.
Purchase stock on day five, where the price is three, and sell it on day six, where the price is six, profit = 6 - 3 = 3.
Total Profit is 4+3 = 7. Hence we return 7.

Detailed explanation ( Input/output format, Notes, Constraints, Images )

Input Format

First-line contains 'T', denoting the number of Test cases.

For each Test case:

The first line contains an integer 'N' denoting the size of the array 'PRICES'.
The second line includes 'N' integers denoting the elements of the array 'PRICES'.

Output format :

Return the maximum profit you can achieve.

Note:-

You don't need to print anything. Just implement the given function.

Constraints :

1 <= 'T' <= 10
1 <= 'N' <= 10^5
1<= 'PRICES[i]' <= 10^9, 0 <= i <= 'N-1'

Time Limit: 1 sec

Sample Input 1 :

2
6
7 1 5 4 3 6
6
100 160 220 40 535 695

Sample Output 1 :

7
775

Explanation Of Sample Input 1 :

For test case 1:

'PRICES' = [7, 1, 5, 4, 3, 6]

Purchase stock on day two, where the price is one, and sell it on day three, where the price is five, profit = 5 - 1 = 4.
Purchase stock on day five, where the price is three, and sell it on day six, where the price is six, profit = 6 - 3 = 3.
Total Profit is 4+3 = 7. Hence we return 7.

For test case 2:

'PRICES' = [100, 160, 220, 40, 535, 695]

Purchase stock on day one, where the price is 100, and sell it on day three, where the price is 220, profit = 220 - 100 = 120.
Purchase stock on day four, where the price is 40, and sell it on day six, where the price is 695, profit = 695 - 40 = 655.

Total Profit is 120+655 = 775. Hence we return 775.

Sample Input 2 :

Sample Output 2 :

0
0

Auto

Console