#include <iostream>

using namespace std;

int parseNum(char);

int main() {

    char opr,first,second;

    cin >> opr >> first >> second;

    int firstVal = parseNum(first);
    int secondVal = parseNum(second);


    if (opr == '+') {
        cout << firstVal + secondVal;
    } else if (opr == '-') {
        cout << firstVal - secondVal;
    } else if (opr == '*') {
        cout << firstVal * secondVal;
    } else if (opr == '/') {
        cout << firstVal / secondVal;
    } else if (opr == '%') {
        cout << firstVal % secondVal;
    }
    return 0;
}

int parseNum(char symbol){
    int num = 0;
    switch (symbol) {
        case '0':
            num = 0;
            break;
        case '1':
            num = 1;
            break;
        case '2':
            num = 2;
            break;
        case '3':
            num = 3;
            break;
        case '4':
            num = 4;
            break;
        case '5':
            num = 5;
            break;
        case '6':
            num = 6;
            break;
        case '7':
            num = 7;
            break;
        case '8':
            num = 8;
            break;
        case '9':
            num = 9;
            break;
        case 'A':
            num = 10;
            break;
        case 'B':
            num = 11;
            break;
        case 'C':
            num = 12;
            break;
        case 'D':
            num = 13;
            break;
        case 'E':
            num = 14;
            break;
        case 'F':
            num = 15;
            break;
    }

    return num;
}