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

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