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