import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        BigDecimal f = scanner.nextBigDecimal();
        System.out.println(f.setScale(0, RoundingMode.FLOOR));
    }
}