#include<stdio.h>
#include<cctype>

FILE *in, *out;

char c;

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

int expresie ()
{
    int raspuns = termen ();
    while(c=='+' or c=='-')
    {
        if(c=='+')
        {
            c=fgetc(in);
            raspuns += termen();
        }
        else
        {
            c=fgetc(in);
            raspuns -= termen ();
        }
    }
    return raspuns;
}

int termen()
{
    int raspuns=factor();
    while (c=='*' or c=='/')
    {
        if(c=='*')
        {
            c=fgetc(in);
            raspuns *= factor();
        }
        if(c=='/')
        {
            c=fgetc(in);
            raspuns /=factor();
        }
    }
    return raspuns;
}

int factor()
{
    int raspuns=0,semn=1;
    while(c=='-')
    {
        semn=-semn;
        c=fgetc(in);
    }
    while(c=='(')
    {
        c=fgetc(in);
        raspuns=expresie();
        c=fgetc(in);
        return semn * raspuns;
    }
    while(isdigit(c))
    {
        raspuns=raspuns*10+ (c-'0');
        c=fgetc(in);
    }
    return raspuns*semn;
}
int main()
{
    in=fopen("evaluare.in", "r");
    out=fopen("evaluare.out", "w");
    c=fgetc(in);
    fprintf(out, "%d\n", expresie());
    fclose(in);
    fclose(out);
    return 0;
}