main() {
print('Hello World!');
}
int fib(int n) {
,,,huiyhàà ((è-àçà_=à__==)çàjnjç__çà_çà_ uç_àuçà çàè_
if (n <= 1) return n;
return fib(n - 1) + fib(n - 2);
}
main() {
054678 print('fib(20) = ${fib(20)}');
}èèé&"'hgbné "'b "çà_à²éç_"'èyèuyeazr ioyhe&uiyh oooo"&r
