#include <iostream>
#include <fstream>
#include <cstring>

using namespace std;

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

int EvaluareTermen();
int EvaluareFactor();
int EvaluareExpresie();
int eval();

char e[100005];
int lg,i;

int eval()
{
    int nr=0;
    while(e[i]<='9' && e[i]>='0') nr=nr*10+e[i]-'0',i++;

    i--;
    return nr;

}
int EvaluareFactor()
{
    int f;
    if(e[i]=='(')
    {
        i++;
        f=EvaluareExpresie();

        i++; ///sar peste )
    }
    else f=eval(),i++;

    return f;
}
int EvaluareTermen()
{
    int f=EvaluareFactor();
    while(i<lg && (e[i]=='*' || e[i]=='/'))
    {
        i++;
        if(e[i-1]=='*') f*=EvaluareFactor();
        else f/=EvaluareFactor();
    }
    return f;
}

int EvaluareExpresie()
{
    int f=EvaluareTermen();
    while(i<lg && (e[i]=='+' || e[i]=='-') )
    {
        i++; ///sar peste semn;
        if(e[i-1]=='+') f+=EvaluareTermen();
        else f-=EvaluareTermen();

    }
    return f;

}

int main()
{
    fin>>e;
    lg=strlen(e);
    fout<<EvaluareExpresie();

    return 0;
}