#include <iostream>
#include <fstream>
using namespace std;

char s[100001];
int p=0;
int expresie();
int termen();
int factor();

int expresie(){
 int sum=termen();
 while(s[p]=='+' || s[p]=='-'){
    if(s[p]=='+'){
        p++;
        sum+=termen();
    }else{
        p++;
        sum-=termen();
    }
 }
  return sum;
}

int termen(){
    int prod=factor();
    while(s[p]=='*' || s[p]=='/')
    {
        if(s[p]=='*')
        {
            p++;
            prod=prod*factor();
        }else
        {
            p++;
            prod=prod/factor();
        }
    }
    return prod;
}

int factor(){
    int val=0;
    if(s[p]=='(')
    {
        p++;
        val=expresie();
        p++;
        return val;
    }
    while(s[p]>='0' && s[p]<='9')
    {
        val=val*10 + (s[p]-'0');
    }
    return val;
}

int main()
{

ifstream cin("evaluare.in");
ofstream cout("evaluare.out");

cin>>s;
cout<<expresie();

    return 0;
}