#include <cstdio>

using namespace std;

char s[100001], *p;
int eval();
int termen();
int factor();
int main()
{
    freopen("evaluare.in", "r", stdin);
    freopen("evaluare.out", "w", stdout);
    scanf("%s", s);
    p=s;
    printf("%d\n", eval());
    return 0;
}
int eval()
{
    int ans=termen();
    while(*p=='+' or *p=='-')
        if(*p=='+')
        {
            p++;
            ans+=termen();
        }
        else
        {
            p++;
            ans-=termen();
        }
    return ans;
}
int termen()
{
    int ans=factor();
    while(*p=='*' or *p=='/')
        if(*p=='*')
        {
            p++;
            ans*=factor();
        }
        else
        {
            p++;
            ans/=factor();
        }
    return ans;
}
int factor()
{
    int ans=0;
    if(*p=='(')
    {
        p++;
        ans=eval();
        p++;
    }
    else
        while('0'<=*p and *p<='9')
        {
            ans=ans*10+*p-'0';
            p++;
        }
    return ans;
}