#include <fstream>
#include <string>

#define NMAX 100010

using namespace std;
ofstream fout("evaluare.out");
ifstream fin("evaluare.in");

int eval();
int factor();
int termen();

char s[NMAX], *p = s;

int eval(){
    int r = termen();

    while(*p == '+' || *p == '-'){
        if(*p == '+'){
            p++;
            r += termen();
        }

        else{
            p++;
            r -= termen();
        }
    }

    return r;
}

int termen(){
    int r = factor();

    while(*p == '*' || *p == '/'){
        if(*p == '*'){
            p++;
            r *= factor();
        }

        else{
            p++;
            r /= factor();
        }
    }

    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(){
    fin >> s;
    fout << eval();
}