#include <fstream>

using namespace std;
ifstream cin ("evaluare.in");
ofstream cout ("evaluare.out");
char s[100003];
int p;
int expresie();
int termen();
int factor();
int expresie ()
{
    int sum=termen();
    while(s[p]=='+' || s[p]=='-')
    {
        if(s[p]=='+')
        {
            ++p;
            sum+=termen();
        }
        else
        {
            ++p;
            sum-=termen();
        }
    }
    return sum;
}
int termen ()
{
    int sum=factor();
    while(s[p]=='*' || s[p]=='/')
    {
        if(s[p]=='*')
        {
            ++p;
            sum*=factor();
        }
        else
        {
            ++p;
            sum/=factor();
        }
    }
    return sum;
}
int factor ()
{
    int semn=1,val=0;
    while(s[p]=='-')
    {
        semn=-semn;
        ++p;
    }
    if(s[p]=='(')
    {
        ++p;
        val=expresie();
        ++p;
        return semn*val;
    }
    while(s[p]>='0' && s[p]<='9')
    {
        val=val*10+(s[p]-'0');
        ++p;
    }
    return semn*val;
}
int main()
{
    long long r,i,cur=0,cnt=0,inmul,imp=2;
    cin>>s;
    cout<<expresie();
}