#include <fstream>
#include <cstring>
using namespace std;

char s[100010];
int i;

int expresie();
int termen();
int factor();


int expresie()
{
    int r=termen();
    while(s[i]=='+' || s[i]=='-')
        if(s[i]=='+')
        {
            i++;
            r+=termen();
        }
        else
        {
            i++;
            r = termen() - r;
        }

    return r;
}


int termen()
{
    int r=factor();
    while(s[i]=='*' || s[i]=='/')
        if(s[i]=='*')
        {
            i++;
            r*=factor();
        }
        else
        {
            i++;
            r = factor() / r;
        }

    return r;
}




int factor()
{
    int r;
    if(s[i]=='(')
    {
        i++;
        r=expresie();
        i++;
    }
    else
    {
        r=0;
        int p = 1;
        while(s[i]>='0' && s[i]<='9')
        {
            r=r+ (s[i]-'0')*p;
            p*=10;
            i++;
        }

    }
    return r;
}



int main()
{
    ifstream f("evaluare.in");
    ofstream g("evaluare.out");
    f>>s;

    for (int i = 0, j = strlen(s) - 1; i < j; ++i, --j)
        swap(s[i],s[j]);

    for (int i = 0; i < s[i]; ++i) {

        if (s[i] == '(')
            s[i] = ')';
        else if(s[i] == ')')
            s[i] = '(';

    }

    g<<expresie();
    f.close();
    g.close();
    return 0;
}