#include <iostream>
#include <fstream>

using namespace std;

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

int eval(),termen(),factor();

char *p;

int eval()
{
    int res=termen();
    while(*p!='\00' && *p!=')')
    {
        int op=(*p=='+')? 1:0;
        ++p;
        int t=termen();
        if(op)
            res+=t;
        else
            res-=t;
    }
    ++p;
    return res;
}

int termen()
{
    int t=0;
    if(*p=='(')
    {
        ++p;
        t=eval();
         while(*p=='*' || *p=='/')
    {
        int op=(*p=='*')? 1:0,x=0;
        ++p;
        while(*p>='0' && *p<='9')
            x=x*10+(*p-'0'),++p;
        if(op)
            t*=x;
        else
            t/=x;
    }
    return t;
    }
    while(*p>='0' && *p<='9')
        t=t*10+(*p-'0'),++p;
    while(*p=='*' || *p=='/')
    {
        int op=(*p=='*')? 1:0,x=0;
        ++p;
        while(*p>='0' && *p<='9')
            x=x*10+(*p-'0'),++p;
        if(op)
            t*=x;
        else
            t/=x;
    }
    return t;
}


int main()
{
    char s[100];
    p=s;
    f>>s;
    g<<eval();

    return 0;
}