#include <cstdio>
#include <cstring>
#define N 100002

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

char s[N];
int p;

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


int main()
{
    FILE *in, *out;
    in = fopen("evaluare.in", "r");
    out = fopen("evaluare.out", "w");
    fgets(s, N, in);
    fclose(in);
    fprintf(out, "%d", expresie());
    fclose(out);
    return 0;
}