library;
import self as self;
import "dart:core" as core;

static method fibonacci(core::int* n) → core::int* {
  if(n.{core::num::<}(2))
    return n;
  return self::fibonacci(n.{core::num::-}(1)).{core::num::+}(self::fibonacci(n.{core::num::-}(2)));
}
static method main() → dynamic {
  for (core::int* i = 0; i.{core::num::<}(20); i = i.{core::num::+}(1)) {
    core::print(self::fibonacci(i));
  }
}