#include <fstream>
#include <string>

std::ifstream f("input.in");
std::ofstream g("output.out");

int i,expresie(),termen(),factor();
std::string s;

int expresie(){
    
    int r = termen();
    
    while(s[i] == '+' || s[i] == '-'){
        
        if(s[i] == '+'){
            i++;
            r += termen();
        }else{
            i++;
            r -= termen();
        }
    }
    
    return r;
}

int termen(){
    
    int r = factor();
    
    while(s[i] == '*' || s[i] == '/'){
        
        if(s[i] == '*'){
            i++;
            r *= factor();
        }else{
            i++;
            r /= factor();
        }
    }
    
    return r;
}

int factor(){
    
    int r = 0;
    
    if(s[i] == '('){
        i++;
        r = expresie();
        i++;
    }else{
        
        while(s[i] >= '0' && s[i] <= '9')
            r = r * 10 + (s[i++] - '0');
    }
    
    return r;
}

int main(){
    
    f >> s;
    
    g << expresie();
    
    return 0;
}