Programming Fundamentals Final Exam 04.04.2020

Problem 1. Password Reset

Yet again you have forgotten your password... Naturally it`s not the first time this has happened. Actually you got so tired of it that you decided to help yourself with a smart solution.

Write a password reset program that performs a series of commands upon a predefined string. First, you will receive a string and afterwards, until the command "Done" is given, you will be receiving strings with commands split by a single space. The commands will be the following:

• TakeOdd
  •  Takes only the characters at odd indices and concatenates them together to
    obtain the new raw password and then prints it.
• Cut {index} {length}
  • Gets the substring with the given length starting from the given index from the password and removes its first occurrence of it, then prints the password on the console.
  • Then prints the new raw password itself on a new line.
  • The given index and length will always be valid.
• Substitute {substring} {substitute}
  • If the raw password contains the given substring, replaces all of its
    occurrences with the substitute text given and prints the result.
  • If it doesn’t, prints "Nothing to replace!"

Input

• You will be receiving strings until the "Done" command is given.

Output

• After the "Done" command is received, print:
  • "Your password is: {password}"

Constraints

• The indexes from the "Cut {index} {length}" command will always be valid.

Examples

Това е кода ми :https://pastebin.com/rgQMXrUV  

Така и не успях да я реша на изпита дава ми резултат 50/100 и грешките са от тип Timeout и не разбирам защо работи по-бавно кода.

Ще съм много благодарен ако някой сподели мнение и решение по този проблем.