#include <bits/stdc++.h>
#pragma GCC optimize ("O3")

using namespace std;

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

string eval;
int poz, lim;

int number(){
    int answer = 0;
    while(poz < lim && ('0' <= eval[poz] && eval[poz] <= '9')){
        answer = answer * 10 + (eval[poz] - '0');
        poz++;
    }
    return answer;
}

int expresie();

int factor(){
    int semn = 1;
    while(poz < lim && (eval[poz] == '+' || eval[poz] == '-')){
        if(eval[poz] == '-')
            semn = (semn == 1 ? -1 : 1);
        poz++;
    }

    int answer;
    if(eval[poz] == '('){
        poz++; ///sar peste (
        answer = expresie();
        poz++; ///sar peste )
        return semn * answer;
    }else{
        return semn * number();
    }
}

int termen(){
    int answer = factor();
    while(poz < lim && (eval[poz] == '*' || eval[poz] == '/')){
        if(eval[poz] == '*'){
            poz++; ///sar peste *
            answer *= factor();
        }else if(eval[poz] == '/'){
            poz++; ///sar peste /
            answer /= factor();
        }
    }
    return answer;
}

int expresie(){
    int answer = termen();
    while(poz < lim && (eval[poz] == '+' || eval[poz] == '-')){
        if(eval[poz] == '+'){
            poz++; ///sar peste +
            answer += termen();
        }else if(eval[poz] == '-'){
            poz++; ///sar peste -
            answer -= termen();
        }
    }
    return answer;
}

int main(){
    ios_base::sync_with_stdio(false);
    fin.tie(nullptr), fout.tie(nullptr);

    fin>>eval;

    poz = 0, lim = (int)eval.size();
    fout<<expresie();
    return 0;
}