Homework Answers

Maximum Profit

You given a list of prices where prices[i] is the price of a given stock o the i th day write a program to print the maximum profit by choosing a single day to buy a stock and choosing a different day in the future to sell that stock if these is no profit that can be achieved return 0

INPUT

The input is a single line containing space seperated integers.

OUTPUT

The output should be an integer.

Explanation

in the example the given prices are 7 1 5 3 6 4

buying stocks on day two having price 1 and selling them on the fifth day having price 6 would give the maximum profit which is 6 - 1

so the output should be 5.

sample input 1

7 1 5 3 6 4

sample output 1

5

sample input 2

1 11 13 21 19

sample output 2

20

String Concatenation

Disha has three strings A, B, and C consisting of lowercase letters.She also has a string T consisting only of characters 1, 2 and 3.

She wants to concatenate the three strings according to the characters in T.

Your task is to print the final output string.

Note: Formally, follow the below instructions:

* For each integer i such that 1<=i<=|T|, let the string si be defined as follows:

• A if Ti = 1.
• B if Ti = 2.
• C if Ti = 3.

*Concatenate the strings s1,s2,...,s|T| in this order and print the resulting string.

Sample Input1

mari

to

zzo

1321

Sample Output1

marizzotomari

Number Game

A group of people are playing a game.They are standing and each carring a card with a number on it.These numbers in the list A. A random number S iis selected.

Find out the new list of numbers after

• S people were removed from the left.
• S people were removed from the right.

Sample Input1

1,2,3

1

Sample Output1

2 3

1 2

Word Rotation

Given a sentence and an integer N, write a program to rotate letters of the sentence among the words without changing the length of those words and positions of the spaces.

Input

The first line of input will be a sentence.

The second line of input will be an integer N.

Output

The output should be a single line containing the sentence by rotating the letters among the words without changing the length of the words and positions of the spaces.

Explanation

For example, if the given sentence and N are

Welcome to your first problem

5

Rotate the sentence 5 letters towards right side without changing the length of the words and position of spaces in the original sentence.

So the output should be

oblemWe lc omet oyour firstpr

Sample Input 1

Welcome to your first problem

5

Sample Output 1

oblemWe lc omet oyour firstpr

Sample Input 2

All the best

2

Sample Output 2

stA llt hebe