#include <iostream>
#include <fstream>

using namespace std;

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

char s[100001];
int p;
int EvalExpresie();
int EvalTermen();
int EvalFactor();
int EvalExpresie()
{
    int sum=EvalTermen();
    while(s[p]=='+' || s[p]== '-')
    {
        if(s[p]=='+')
        {
            p++;
            sum+=EvalTermen();
        }
        else
        {
            p++;
            sum-=EvalTermen();
        }
    }
    return sum;
}
int EvalTermen()
{
    int prod=EvalFactor();
    while(s[p]=='*' || s[p]=='/')
    {
        char op=s[p];
        p++;
        if(op=='*')
            prod*=EvalFactor();
        else
            prod/=EvalFactor();
    }
    return prod;
}
int EvalFactor()
{
    int semn=1;
    int val=0;
    while(s[p]=='-')
    {
        p++;
        semn=-semn;
    }
    if(s[p]=='(')
    {
        p++;
        val=EvalExpresie();
        p++;
        return semn*val;
    }
    while('0'<=s[p] && s[p]<='9')
    {
        val=val*10+s[p]-'0';
        p++;
    }
    return semn*val;
}
int main()
{
    in>>s;
    out<<EvalExpresie();
    return 0;
}