#include <fstream>

using namespace std;
ifstream in ("evaluare.in");
ofstream out ("evaluare.out");
int expresie ();
int factor ();
int termen();
char s[100000];
int p;
int main() {
    in>>s;
    out<<expresie();
    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;
}