#include<cstdio>
using namespace std;
const int NMAX = 100005;
char S[NMAX],*p;
int E(),T(),F();
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 rez=T();
    while(*p=='+' || *p=='-')
    {
        if(*p=='+') p++,rez+=T();
        else p++,rez-=T();
    }
    return rez;
}
int T()
{
    int rez=F();
    while(*p=='*' || *p=='/')
    {
        if(*p=='*') p++,rez*=F();
        else p++,rez/=F();
    }
    return rez;
}
int F()
{
    int rez=0;
    if(*p=='(') {p++;rez=E();p++;return rez;}
    while(*p>='0' && *p<='9') rez=rez*10+*p-'0',p++;
    return rez;
}