/// () -> * / -> + -
#include<fstream>
#include<string>
using namespace std;
ifstream cin("evaluare.in");
ofstream cout("evaluare.out");
string s;
int expresie(int& p);
int termen(int& p);
int factor(int& p);
int valoare(int& p);
/// a + b + c + d - e
int expresie(int& p){
int ans = termen(p);
while(p < s.size() && (s[p] == '+' || s[p] =='-')){
int sign = (s[p]=='-' ? -1 : 1);
p++;
ans += sign * termen(p);
}
return ans;
}
/// a * b * c / d
int termen(int& p){
int ans = factor(p);
while(p < s.size() && (s[p] == '*' || s[p] == '/')){
char op = s[p];
p++;
int aux = factor(p);
if (op == '*') ans *= aux;
else ans /= aux;
}
return ans;
}
/// (...)
/// -3 0 9
int factor(int& p){
int ans;
if (s[p] == '('){
p++;
ans = expresie(p);
p++;
}
else ans = valoare(p);
return ans;
}
int valoare(int& p){
int sign = 1;
if (s[p] == '-'){
sign = -1;
p++;
}
int ans = 0;
while(p < s.size() && s[p] >= '0' && s[p] <= '9'){
ans = ans * 10 + s[p] - '0';
p++;
}
return ans * sign;
}
int main(){
int p = 0;
cin>>s;
cout<<expresie(p)<<endl;
return 0;
}