public/subjects/unzipstring/README.md

Unzipstring

Instructions

write a function named Unzipstring that takes a string in form of a number and an alphabet (like 3w or 2m3e) then returns the original string (3w ==> www and 2m3e ==> mmeee).

• The number before the alphabet should be between 0 to 9.
• The one alphabet after each number should be between a to z or A to Z.
• It can't be two numbers or two alphabets in a row.
• If the Input string doesn't respect the format return Invalid Input.

Expected Function

func Unzipstring(s string) string {
}

Usage

Here is a possible program to test your function:

package main

import "fmt"

func main() {
    fmt.Println(Unzipstring("2f"))
    fmt.Println(Unzipstring("2O5u2H0e"))
    fmt.Println(Unzipstring("3p6i1W"))
    fmt.Println(Unzipstring("6H8a"))
    fmt.Println(Unzipstring("2p4;7g"))
    fmt.Println(Unzipstring("2a 6p8f"))
    fmt.Println(Unzipstring("2t4dD"))
    fmt.Println(Unzipstring("82t4D"))
    fmt.Println(Unzipstring(""))
}

And its output :

$ go run .
$ff
$OOuuuuuHH
$pppiiiiiiW
$HHHHHHaaaaaaaa
$pp;;;;ggggggg
$Invalid Input
$Invalid Input
$Invalid Input
$Invalid Input