#include <fstream>
#include <string.h>
//codeblocks the great!
using namespace std;

const int N = 100001;

ifstream in("evaluare.in");
ofstream out("evaluare.out");

char c[N];
int p=0;
int exp();
int ter();
int fact();

int exp()
{
    int sum=ter();
    while(c[p]=='+'||c[p]=='-')
    {
        if(c[p]=='+')
        {
            p++;
            sum+=ter();
        }
        else
        {
            p++;
            sum-=ter();
        }
    }
    return sum;
}

int ter()
{
    int prod=fact();
    while(c[p]=='*'||c[p]=='/')
    {
        if(c[p]=='*')
        {
            p++;
            prod=prod*fact();
        }
        else
        {
            p++;
            prod/=fact();
        }
    }
    return prod;
}

int fact()
{
    int semn=1,val=0;
    while(c[p]=='-')
    {
        p++;
        semn=-semn;
    }
    if(c[p]=='(')
    {
        p++;
        val=exp();
        p++;
        return semn*val;
    }
    while(isdigit(c[p]))
    {
        val=val*10+(c[p]-'0');
        p++;
    }
    return semn*val;
}

int main()
{
    in.getline(c,N);
    out<<exp();
    return 0;
}