#include <bits/stdc++.h>
#define N 100001
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
char e[N];
int i,lg,lgp;
int Expresie();
int Termen();
int Factor();
int main()
{
    fin.getline(e,N);
    fout<<Expresie();
    return 0;
}
int Expresie()///+, -
{
    int sum=Termen();
    while((e[i]=='+'||e[i]=='-'))
        if(e[i]=='+')
        {
            i++;
            sum+=Termen();
        }
        else
        {
            i++;
            sum-=Termen();
        }
        return sum;
}
int Termen()///*, /
{
    int prod=Factor();
    while((e[i]=='*'||e[i]=='/'))
        if(e[i]=='*')
        {
            i++;
            prod*=Factor();
        }
        else
        {
            i++;
            prod/=Factor();
        }
        return prod;
}
int Factor() ///litera, expresie intre ()
{
    int semn=1,val=0;
    while(e[i]=='-')
    {
        semn=-semn;
        i++;
    }
    if(e[i]=='(')
    {
        i++;
        val=Expresie();
        i++;

        return semn*val;
    }
    while(e[i]>='0'&&e[i]<='9')
        val=val*10+(e[i++]-'0');
    return semn*val;
}