#include <bits/stdc++.h>
#define impartire 1000000001
#define inmultire 1000000002
#define scadere 1000000003
#define paranteza 1000000004
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
char s[100005];
int st[100005],top;
void Citire()
{
    fin>>s;
    fin.close();
}
void Rez()
{
    int nr=0;
    int i=0;
    while(s[i]!=0)
    {
        if(s[i]=='/')
            st[++top]=impartire,i++;
        if(s[i]=='*')
            st[++top]=inmultire,i++;
        if(s[i]=='-')
            st[++top]=scadere,i++;
        if(s[i]=='+')
            i++;
        if(s[i]=='(')
            st[++top]=paranteza,i++;
        if(isdigit(s[i]))
        {
            nr=0;
            while(isdigit(s[i]))
                nr=nr*10+(s[i]-'0'),
                i++;
            if(st[top]==scadere)
                nr*=-1,
                top--;
            while(st[top]==impartire && top)
            {
                top--;
                nr=st[top]/nr;
                top--;
            }
            while(st[top]==inmultire && top)
            {
                top--;
                nr*=st[top];
                top--;
            }
            st[++top]=nr;
        }
        if(s[i]==')')
        {
            nr=0;
            while(st[top]!=paranteza && top)
                nr+=st[top],
                top--;
            top--;
            while(st[top]==inmultire && top)
            {
                top--;
                nr*=st[top];
                top--;
            }
            while(st[top]==impartire && top)
            {
                top--;
                nr=st[top]/nr;
                top--;
            }
            if(st[top]==scadere)
                nr*=-1,
                top--;
            st[++top]=nr;
            i++;
        }
    }
    nr=0;
    while(top)
    {
        nr+=st[top];
        top--;
    }
    fout<<nr<<"\n";
}
int main()
{
    Citire();
    Rez();
    return 0;
}