#include <iostream>
#include <fstream>
using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
char s[100005],*p;
int eval();
int termen();
int factor();
int main()
{   f>>s;
    p=s;
    g<<eval();
    return 0;
}
int eval()
{   int r=termen();
    while(*p=='+' || *p=='-')
    {   if(*p=='+')
        {   p++;
            r+=termen();
        }
        else
        if(*p=='-')
        {   p++;
            r-=termen();
        }
    }
    return r;
}
int termen()
{   int r=factor();
    while(*p=='*' || *p=='/')
    {   if(*p=='*')
        {   p++;
            r*=factor();
        }
        else
        if(*p=='/')
        {   p++;
            r/=factor();
        }
    }
    return r;
}
int factor()
{   int r;
    if(*p=='(')
    {   p++;
        r=eval();
        p++;
    }
    else
    {   int nr=0;
        while(*p>='0' && *p<='9')
        {   nr=nr*10+*p-'0';
            p++;
        }
        r=nr;
    }
    return r;
}