#include <cstdio>
#include <algorithm>
#include <cstring>
#define Dim 100005

using namespace std;

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

int p;
char s[Dim];

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

}
int factor()
{
    int val=0, semn = 1;
    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';
    return semn * val;
}
int main()
{
    freopen("evaluare.in", "r", stdin);
    freopen("evaluare.out", "w", stdout);
    gets(s);
    printf("%d",expresie());

    return 0;
}