import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double a,b;
        a= scanner.nextInt();
        b = (a-32)/9*5;
        System.out.printf("%.5f",b);
    }
}

RE了三个点，用JAVA写的，求调