#include <iostream>
#include <fstream>

using namespace std;

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

char c[100001];
int p;

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

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

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

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

int main()
{
    in>>c;
    out<<expresie();
    return 0;
}