#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
int i;
char s[100100];
int grad1(),grad2(),grad3();
int grad1(){
    int r=grad2();
    while(s[i]=='+'||s[i]=='-'){
        if(s[i]=='+'){
            i++;
            r+=grad2();
        }
        else
        {
            i++;
            r-=grad2();
        }
    }
return r;
}
int grad2(){
    int r=grad3();
while(s[i]=='*'||s[i]=='/'){
    if(s[i]=='*'){
        i++;
        r*=grad3();
    }
    else
    {
        i++;
        r/=grad3();
    }

}
return r;
}
int grad3(){

int r=0;
if(s[i]=='(')
{
    i++;
    r=grad1();
    i++;
}
else {
    while(s[i]<='9'&&s[i]>='0'){
        r=r*10+s[i]-'0';
        i++;
    }

}

return r;

}


int main()
{
  fin>>s;
  i=0;
  fout<<grad1();
}