#include <stdio.h>

using namespace std;
FILE *f,*g;
char s[100001];
int p,i;

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 semn = 1, val = 0;
    while (s[p] == '-')
    {
        p++;
        semn = -semn;
    }
    if (s[p] == '(')
    {
        p++; //pentru (
        val = expresie();
        p++; //pentru )
        return semn * val;
    }
    while (s[p] >= '0' && s[p] <= '9')
    {
        val = val * 10 + s[p] - '0';
        p++;
    }
    return semn * val;
}

int main()
{
    f=fopen("evaluare.in","r");
    g=fopen("evaluare.out","w");
    while(!feof(f)){
        s[i]=fgetc(f);
        i++;
    }
    fprintf(g,"%d\n",expresie());
    fclose(f);
    fclose(g);
    return 0;
}