#include<fstream>
#include<iostream>
using namespace std;
ifstream in("evaluare.in");
ofstream out("evaluare.out");
char S[100001], *p = S;

int termen();
int factor();

int eval() {
    int r = termen();
    while (*p == '+' || *p == '-') {
        switch (*p) {
            case '+' :
                ++p;
                r += termen();
                break;
            case '-' :
                ++p;
                r -= termen();
                break;
        }
    }
    return r;
}

int termen() {
    int r = factor();
    while (*p == '/' || *p == '*') {
        switch (*p) {
            case '*':
                ++p;
                r *= factor();
                break;
            case '/':
                ++p;
                r /= factor();
                break;
        }
    }
    return r;
}

int factor() {
    int r = 0;
    if (*p == '(') {
        ++p;
        r = eval();
        ++p;
    }
    else {
        while (*p >= '0' && *p <= '9') {
            r = r * 10 + *p - '0';
            ++p;
        }
    }
    return r;
}


int main() {
    in>>S;
    long long K = eval();
    out<<K;
    return 0;
}