#include <bits/stdc++.h>

using namespace std;

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

char s[100005],*p=s;

int eval2();
int eval1();
int eval()
{
    int r=eval1();
    while(*p=='+' or *p=='-')
        if(*p=='+')
            p++, r+=eval();
        else
            p++, r-=eval();
    return r;
}
int eval1()
{
    int r=eval2();
    while(*p=='*' or *p=='/')
        if(*p=='*')
            p++, r*=eval2();
        else
            p++, r/=eval2();
    return r;
}
int eval2()
{
    int r=0;
    if(*p=='(')
        p++, r=eval(), p++;
    else
        while('0'<=*p and *p<='9')
            r=r*10+*p-'0', p++;
    return r;
}
int main()
{

    fin >> s;
    fout << eval();

    return 0;

}