#include <fstream>
#include <cstring>
using namespace std;
ifstream cin("evaluare.in");
ofstream cout("evaluare.out");
int i;
string s;
int solve(),ecuatie(),termen(),constanta();
int constanta(){
    int r=0;
    while(s[i]>='0'&&s[i]<='9')
        r=r*10+s[i++]-'0';
    return r;
}
int solve(){
    int r=ecuatie();
    while(s[i]=='+'||s[i]=='-')
        if(s[i]=='+'){
            i++;
            r+=ecuatie();
        }else if(s[i]=='-'){
            i++;
            r-=ecuatie();
        }
    return r;
}
int ecuatie(){
    int r=termen();
    while(s[i]=='*'||s[i]=='/')
        if(s[i]=='*'){
            i++;
            r*=termen();
        }else if(s[i]=='/'){
            i++;
            r/=termen();
        }
    return r;
}
int termen(){
    int r=0;
    if(s[i]=='('){
        i++;
        r=solve();
        i++;
    }else if(s[i]>='0'&&s[i]<='9')
        r=constanta();
    return r;
}
signed main()
{
    cin>>s;
    cout<<solve();
    return 0;
}