import java.util.Scanner;

/** Calculator
 *
 * @author Mateusz Mlodochowski
 * @version
 */


public class Kalkulator {


/** Funkcja dodawania 2 liczb
 *
 * @param number1 liczba double
 * @param number2 liczba double
 * @return
 */

static double add(double number1,double number2) {

	double sum = 0;
	sum = number1+number2;

	return sum;
}

/** Funkcja odejmowania 2 liczb
 *
 * @param number1 liczba double
 * @param number2 liczba double
 * @return
 */

static double substract(double number1,double number2) {

	double sub = 0;
	sub = number1-number2;

	return sub;
}

/** Funkcja mnozenia 2 liczb
 *
 * @param number1 liczba double
 * @param number2 liczba double
 * @return
 */

static double times(double number1,double number2) {

	double number = 0;
	number = number1*number2;

	return number;
}

/** Funkcja dzielenia 2 liczb
 *
 * @param number1 liczba double
 * @param number2 liczba double
 * @return
 */

static double divide(double number1,double number2) {

	double number = 0;
	number = number1/number2;

	return number;
}

/** Funkcja modulo 2 liczb
 *
 * @param number1 liczba double
 * @param number2 liczba double
 * @return
 */

static double modulo(double number1,double number2) {

	double modulo = 0;
	modulo = number1%number2;

	return modulo;
}

/** Funkcja potegi 2 liczb
 *
 * @param number1 liczba double
 * @param number2 liczba double
 * @return
 */

static double toPower(double number1,double number2) {

	double sum = 0;
	sum = Math.pow(number1, number2);

	return sum;
}

/** Funkcja pierwsiastka liczby
 *
 * @param number liczba double
 *
 * @return double
 */

static double sqrt(double number) {

	if(number < 0) {
		System.out.println("Nie mozna pierwiastkowac liczb ujemnych");
		return 0;
	}

	double root = 0;

	root = Math.sqrt(number);

	return root;
}


	public static void main(String[] args) {
		// TODO Auto-generated method stub

		System.out.println("Jaka operacje chcesz wykonac? (+,-.*,/,%,^,sqrt");

		Scanner input = new Scanner(System.in);
		String c = input.nextLine();


		System.out.println("podaj liczbe");
		int number1 = input.nextInt();

		int number2 = 0;



		if(!c.equals("sqrt")) {

		System.out.println("podaj druga liczbe");
		number2 = input.nextInt();

		}


		switch(c) {

		case "+":
			System.out.println(add(number1,number2));
			break;
		case "-":
			System.out.println(substract(number1,number2));
			break;
		case "*":
			System.out.println(times(number1,number2));
			break;
		case "/":
			System.out.println(divide(number1,number2));
			break;
		case "%":
			System.out.println(modulo(number1,number2));
			break;
		case "^":
			System.out.println(toPower(number1,number2));
			break;
		case "sqrt":
			System.out.println(sqrt(number1));
			break;
		default: System.out.println("Nie ma takiej operacji");
			break;

		}



	}



	}