#include <stdio.h>

using namespace std;

FILE *fin, *fout;

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

char c;

int expresie()
{
    int sum = termen();
    while(c == '+' || c == '-')
    {
        if(c == '+')
        {
            c = fgetc(fin);
            sum = sum + termen();
        }
        else
        {
            c = fgetc(fin);
            sum = sum - termen();
        }

    }
    return sum;
}

int termen()
{
    int prod = factor();
    while(c == '*' || c == '/')
    {
        if(c == '*')
        {
            c = fgetc(fin);
            prod = prod*factor();

        }
        else
        {
            c = fgetc(fin);
            prod = prod/factor();
        }

    }
    return prod;
}

int factor()
{
    int val = 0;
    int semn = 1;
    while(c == '-')
    {
        semn = -semn;
        c = fgetc(fin);
    }
    if(c == '(')
    {
        c = fgetc(fin);
        val = expresie();
        c = fgetc(fin);
        return semn*val;
    }
    while(c >= '0' && c <= '9')
    {
        val = val*10 + (c-'0');
        c= fgetc(fin);
    }
    return semn*val;
}

int main()
{

    fin = fopen("evaluare.in", "r");
    fout = fopen("evaluare.out", "w");
    c = fgetc(fin);
    fprintf(fout, "%d", expresie());
    return 0;
}