#include <stdio.h>
#include <ctype.h>
#define N_MAX 100001

FILE *fin, *fout;

char s[N_MAX];
int p;

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

int main()
{
    fin = fopen("evaluare.in", "r");
    fout = fopen("evaluare.out", "w");

    int n;
    fscanf(fin, "%s", s);
    fprintf(fout, "%d", expresie());
    return 0;
}

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(isdigit(s[p])){
        val = val * 10 + (s[p] - '0');
        p++;
    }
    return semn * val;
}