#include <fstream>
using namespace std;
ifstream f("evaluare.in"); ofstream g("evaluare.out");
char s[100010],*p=s;
int eval();
int factor()
{   int r;
    if(*p=='(') { ++p; r=expresie(); ++p;}
    else
    {   r=0;
        while(*p>='0' && *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 eval()
{   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<<eval()<<'\n'; g.close(); return 0;
}