#include <fstream>

using namespace std;
char s[100005];
int p;
ifstream in("evaluare.in");
ofstream out("evaluare.out");
int expresie();
int termen();
int factor();
int expresie()
{
    int sum=termen();
    while(s[p]=='+'||s[p]=='-')
        if(s[p]=='+')
    {
        p++;
        sum+=termen();
    }
    else
    {
        p++;
        sum-=termen();
    }
    return sum;
}
int termen()
{
    int prod=factor();
    while(s[p]=='*'||s[p]=='/')
        if(s[p]=='*')
    {
        p++;
        prod*=factor();
    }
    else
    {
        p++;
        prod/=factor();
    }
    return prod;
}
int factor()
{
    int val=0,semn=1;
    while(s[p]=='-')
    {
        semn=-semn;
        p++;
    }
    if(s[p]=='(')
    {
        p++;
        val=expresie();
        p++;
        return semn*val;
    }
    while(s[p]>='0'&&s[p]<='9')
    {
        val=val*10+(s[p]-'0');
        p++;
    }
    return semn*val;
}
int main()
{
    in>>s;
    out<<expresie();
    return 0;
}