#include <fstream>

using namespace std;

const int N=100001;
char s[N];
int p;

int expresie();
int termen();
int factor();

int main(){
    ifstream in("evaluare.in");
    in>>s;
    in.close();
    ofstream out("evaluare.out");
    out<<expresie();
    out.close();
    return 0;
}

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

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

int factor(){
    int semn=1, val=0;
    while(s[p]=='-'){
        p++;
        semn=-semn;
    }
    if(s[p]=='('){
        p++;
        val=expresie();
        p++;
        return semn*val;
    }
    while(s[p]>='0' && s[p]<='9'){
        val=val*10+s[p]-'0';
        p++;
    }
    return semn*val;
}