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