#include <iostream>

using namespace std;

int  charToHex(char helper)
{
	if (helper > 47 || helper < 48)
	{
		return helper - 48;
	}
	else if (helper > 64 || helper < 71)
	{
		return helper - 55;
	}
	return -1;
}


int main()
{
	char operation;
	char firstNumChar;
	char secondNumChar;

	cin >> operation >> firstNumChar >> secondNumChar;

	int firstNumInt = charToHex(firstNumChar);
	int secondNumInt = charToHex(secondNumChar);

	int result;

	if (operation == '+')
		result = firstNumInt + secondNumInt;
	if (operation == '-')
		result = firstNumInt - secondNumInt;
	if (operation == '*')
		result = firstNumInt * secondNumInt;
	if (operation == '/')
	{
		if (secondNumInt != 0)
		{
			result = firstNumInt / secondNumInt;
		}
		else
		{
			cout << "Wrong input" << endl;
		}
	}
	if (operation == '%')
	{
		if (secondNumInt != 0)
		{
			result = firstNumInt % secondNumInt;
		}
		else
		{
			cout << "Wrong input" << endl;
		}
	}

	if (result <= 9)
	{
		cout << result;
	}
	else if (result >= 10 && result <= 15)
	{
		result= result + 55;
	}
	else  if (result >= 16)
	{
		int helperOneInt = 0;
		int helperTwoInt = 0;

		helperOneInt = result % 16;
		if (helperOneInt > 16)
		{
			helperTwoInt = (helperOneInt / 16) % 16;
		}

		if ()



			cout << charToHex(result) << endl;


		return 0;
	}