#include <fstream>
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");

int n, i, j;
char s[100002];
int expresie();
int termen();
int factor();

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

int main () {
    i=0;
    fin>>s;
    fout<<expresie();
}