#include <fstream>
#define NMAX 100005

using namespace std;

char s[NMAX];
int p;

int eval();
int termen();
int factor();
int nr();

int main()
{
    ifstream f("evaluare.in");
    ofstream g("evaluare.out");
    f.getline(s,NMAX);
    g<<eval()<<"\n";
    return 0;
}
int eval()
{
    int r=termen();
    while(s[p] == '+' || s[p] == '-')
    {
        if (s[p] == '+') {++p;r+=termen();}
            else if (s[p] == '-') {++p;r-=termen();}
    }
    return r;
}

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

int factor()
{
    int r;
    if(s[p] == '(') {++p;r=eval();++p;}
        else if(s[p] >='0' && s[p]<='9') r=nr();
    return r;
}

int nr()
{
    int n=0;
    while(s[p] >='0' && s[p]<='9')
    {
        n = n * 10 + (s[p] - '0');
        ++p;
    }
    return n;
}