#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>

char c;

int expresie();
int termen();
int factor();
int nr();

int expresie()
{
    int rez=termen();
    while(c=='+' || c=='-')
    {
        if(c=='+')
        {
            c=getchar();
            rez+=termen();
        }
        else
        {
            c=getchar();
            rez-=termen();
        }
    }
    return rez;
}
int termen()
{
    int rez=factor();
    while(c=='*' || c=='/')
    {
        if(c=='*')
        {
            c=getchar();
            rez*=factor();
        }
        else
        {
            c=getchar();
            rez/=factor();
        }
    }
    return rez;
}
int factor()
{
    int rez=0,semn=1;
    while(c=='-')
    {
        c=getchar();
        semn=-semn;
    }
    while(c=='(')
    {
        c=getchar();
        rez=expresie();
        c=getchar();
        return semn*rez;
    }
    while(isdigit(c))
    {
        rez=rez*10+c-'0';
        c=getchar();
    }
    return rez*semn;
}
int main()
{
    int ;
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);
    c=getchar();
    printf("%d\n",expresie());

    return 0;
}