Съдействие за задачка. По долу съм сложил линк - опит за решение.

 **** 

02. Array Modifier

You are given an array with integers. Write a program to modify the elements after receive the commands “swap”, “multiply” or “decrease”.

• “swap {index1} {index2}” take two elements and swap their places.

• “multiply {index1} {index2}” take element at the 1st index and multiply it with element at 2nd index. Save the product at the 1st index.

• “decrease” decreases all elements in the array with 1.

Input

On the first input line you will be given the initial array values separated by a single space.

On the next lines you will receive commands until you receive the command “end”. The commands are as follow:

• “swap {index1} {index2}”

• “multiply {index1} {index2}”

• “decrease”

Output

The output should be printed on the console and consist element of the modified array – separated by “, “(comma and single space).

Constraints

• Commands will be: “swap”, “multiply”, “decrease” and “end”

• Elements of the array will be integer numbers in the range [-231...231]

• Count of the array elements will be in the range [2...100]

• Indexes will be always in the range of the array

**** END TXT****

 Опит за решение:   https://pastebin.com/1PdrLBVs