#include <cstdio>
#include <cstring>
using namespace std;
const int nmax=100000;
int n,p;
char s[nmax+5];
int expresie();
int termen();
int factor();
int expresie()
{
    int sum=termen();
    while(s[p]=='-' || s[p]=='+')
    {
        p++;
        if(s[p-1]=='+')
            sum+=termen();
        else
            sum-=termen();
    }
    return sum;
}
int termen()
{
    int prod=factor();
    while(s[p]=='*' || s[p]=='/')
    {
        p++;
        if(s[p-1]=='*')
            prod*=factor();
        else
            prod/=factor();
    }
    return prod;
}
int factor()
{
    int val=0,semn=1;
    while(s[p]=='-')
    {
        semn*=-1;
        p++;
    }
    if(s[p]=='(')
    {
        p++;
        val=expresie();
        p++;
        return semn*val;
    }
    while('0'<=s[p] && s[p]<='9')
    {
        val=val*10+s[p]-'0';
        p++;
    }
    return semn*val;
}
int main()
{
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);
    gets(s);
    n=strlen(s);
    printf("%d",expresie());
    return 0;
}
/**

**/