#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
string s;
int N,i;
char oper[4][3]={"","+-","*/",""};
int fin(int a,char operat, int b)
{
    if(operat=='+')
        return a+b;
    if(operat=='-')
        return a-b;
    if(operat=='*')
        return a*b;
    return a/b;
}
int calc(int level)
{
    int value=0,aux;
    char carac;
    if(level==3)
    {
        if(s[i]=='(')
        {
            i++;
            value=calc(1);
            i++;
        }
        else
            for(; strchr("0123456789",s[i]) && i<=N; value=value*10+s[i]-'0' , i++);
    }
    else
    {
        value=calc(level+1);
        for(  ; strchr(oper[level],s[i]) && i<=N; )
        {
            carac=s[i++];
            aux = fin(value , carac , calc(level+1) ) , value=aux ;
        }
    }
    return value;
}

int main()
{
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);
    std::cin>>s;
    N=s.length()-1;
    std::cout<<calc(1)<<"\n";
    return 0;
}