#include <fstream>

using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
char v[100001];
int i;
int termen();
int factor();
int evaluare()
{
    int r=termen();
    while(v[i]=='+'||v[i]=='-')
    {
    if(v[i]=='+') {i++;r+=termen();}
    else if(v[i]=='-') {i++;r-=termen();}
    }
    return r;
}
int factor()
{
    int r=0;
    if(v[i]=='(')
    {
        i++;
        r=evaluare();
        i++;
    }
    else
    {
        while(v[i]>='0'&&v[i]<='9')
        {
            r=r*10+v[i]-'0';
            i++;
        }
    }
    return r;
}
int termen()
{
    int r=factor();
    while(v[i]=='*'||v[i]=='/')
    {
    if(v[i]=='*') {i++;r*=factor();}
    else if(v[i]=='/') {i++;r/=factor();}
    }
    return r;
}
int main()
{
    fin>>v;
    fout<<evaluare();
}