#include <fstream>
using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
char S[100010],*p=S;
int expresie();
int factor()
{
    int r;
    if(*p=='(')
    {
        ++p;
        r=expresie();
        ++p;
    }
    else
    {
        r=0;
        while('0'<=*p && *p<='9')
        {
            r=r*10+*p-'0';
            ++p;
        }
    }
    return r;
}
int termen()
{
    int r=factor();
    while(*p=='*' || *p=='/')
       switch(*p)
    {
        case '*' : ++p;r*=factor(); break;
        case '/' : ++p;r/=factor(); break;
    }
    return r;
}
int expresie()
{
    int r=termen();
    while(*p=='+' || *p=='-')
        switch(*p)
    {
        case '+' : ++p;r+=termen(); break;
        case '-' : ++p;r-=termen(); break;
    }
    return r;
}
int main()
{
    f>>S;
    g<<expresie();
    g.close();
    return 0;
}