#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=eval();++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 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();
    g.close();
    f.close();
}