/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Scanner reader0 = new Scanner(System.in);
        System.out.println("Please enter first number");
        double a = reader0.nextDouble();
        System.out.println("Please enter one of the following function inputs; + to add numbers, - to subtract numbers, * to multiply, / to divide, ^ to power, # to square root.");
        String operator = reader0.next();
        double result = 0.0;
        if (operator.equals("#")) {
            result = Math.sqrt(a);
        } else {
            System.out.println("Please enter second number");
            double b = reader0.nextDouble();
            switch (operator) {
                case "+":
                    result = a + b;
                    break;
                case "-":
                    result = a - b;
                    break;
                default:
                    System.out.println("Invalid entry entered");
                    break;
            }
        }
        System.out.println("Result is " + result);
	}
}