package com.company;
import java.util.*;
public class Main {

    public static void main(String[] args) {

        Scanner function= new Scanner(System.in);
        String a=function.nextLine();
        if(a.equals("sin")||a.equals("cos")||a.equals("tan")){
            Scanner radian= new Scanner(System.in);
            double b=radian.nextDouble();
        }
        else{
            Double.parseDouble(a);
            Scanner sc= new Scanner(System.in);
            String b=sc.nextLine();
            Scanner sc1= new Scanner(System.in);
            double c=sc1.nextDouble();
            if(b.equals("^"))
                double d=zhishu.zhishu(a,c);
            if(b.equals("log"))
                double d=fengsj1.duishu(a,c);
            if(b.equals("+"))
                double d=Jiajianchengchu.jia(a,c);
            if(b.equals("-"))
                double d=Jiajianchengchu.jian(a,c);
            if(b.equals("*"))
                double d=Jiajianchengchu.cheng(a,c);
            if(b.equals("/"))
                double d=Jiajianchengchu.chu(a,c);
            System.out.println(d);
        }
    }
}