#include<cstdio>
using namespace std;
int e(),t(),f();
char s[100005],*p;
int main()
{
	freopen("evaluare.in","r",stdin);
	freopen("evaluare.out","w",stdout);
	scanf("%s",s); p=s; printf("%d\n",e());
	return 0;
}
int e()
{
    int r=t();
    while(*p=='+' || *p=='-')
    {
        if(*p=='+') p++,r+=t();
        else p++,r-=t();
    }
    return r;
}
int t()
{
    int r=f();
    while(*p=='*' || *p=='/')
    {
        if(*p=='*') p++,r*=t();
        else p++,r/=t();
    }
    return r;
}
int f()
{
    int r=0;
    if(*p=='(') {p++; r=e(); p++; return r;}
    while(*p>='0' && *p<='9') r=r*10+*p-'0',p++;
    return r;
}