public/subjects/game23.en.md

game23

WARNING! VERY IMPORTANT!

For this exercise a function will be tested with the exam own main. However the student still needs to submit a structured program:

This means that:

• The package needs to be named package main.
• The submitted code needs one declared function main(func main()) even if empty.
• The function main declared needs to also pass the Restrictions Checker(illegal functions tester). It is advised for the student to just empty the function main after its own testings are done.
• Every other rules are obviously the same than for a program.

Instructions

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You are given 2 positive integers 'a' and 'b'. Your task is to perform some operations in 'a' so that it becomes 'b'. You can only multiply 'a' by 2, and multiply 'a' by 3. If you can get to 'b', return minimal number of operations required to get from 'a' to 'b'. If you cannot get to 'b' return -1.

Expected function

func Game23(a, b int) int {

}

Usage

Here is a possible program to test your function :

package main

import (
	"fmt"
)

func main() {
	fmt.Println(Game23(1, 3))
	fmt.Println(Game23(2, 3))
	fmt.Println(Game23(10, 60))
}

And its output :

student@ubuntu:~/[[ROOT]]/test$ go build
student@ubuntu:~/[[ROOT]]/test$ ./test
1
-1
2
student@ubuntu:~/[[ROOT]]/test$