Number Generator

package main

import (
  "fmt"
  "os"
)

func main() {
    var m, n, l, special, control, num int
    fmt.Scanln(&m)
    fmt.Scanln(&n)
    fmt.Scanln(&l)
    fmt.Scanln(&special)
    fmt.Scanln(&control)

    for i := m; i > 0; i-- {
        for j := n; j > 0; j-- {
            for k := l; k > 0; k-- {
                num = i * 100 + j * 10 + k
                if num % 3 == 0 {
                    special += 5
                } else if num % 5 == 0 {
                    special -= 2
                } else if num % 2 == 0 {
                    special *= 2
                }
                if special >= control {
                    fmt.Printf("Yes! Control number was reached! Current special number is %d.", special)
                    os.Exit(0)
                }
            }
        }
    }

    fmt.Printf("No! %d is the last reached special number.", special)
}