class Exc1 {

  constructor() {}

  method int foo1(int i) throws int, Exc1 {
    if (i < 5) then return i
    else if (i < 20) then return i * 2
    else if (i < 30) then throw i + 11
    else throw this
  }

  method int foo2(int k) throws Exc1 {
    try
      return this.foo1(k) + 8
    catch int e
      return 0
  }

  method void main() throws Exc1 {
    Exc1 o := new Exc1();

    String s := "";
    "Immetti un numero: ".output();
    s.input();
    int in := s.toInt();

    int f := o.foo1(in);
    int g := o.foo2(in + 10);
    "".concat(f + g).concat("\n").output()
  }
}