#include <iostream>
#include <stdio.h>
#include <string.h>

using namespace std;

const int NMAX = 10005;
int fp[NMAX], st[NMAX], s[NMAX];
char sh[NMAX];

int main() {

    freopen ("evaluare.in", "r", stdin);
    freopen ("evaluare.out", "w", stdout);

    int n, nfp, nst, x, i, nr, dei;

    scanf ("%s", sh);
 //   printf ("%s", s);
    n = strlen(sh);
    for (i = 0; i < n; i++) {
        if (sh[i] == '*')
            s[i] = -1;
        if (sh[i] == '/')
            s[i] = -2;
        if (sh[i] == '+')
            s[i] = -3;
        if (sh[i] == '-')
            s[i] = -4;
        if (sh[i] == '(')
            s[i] = -5;
        if (sh[i] == ')')
            s[i] = -6;
        if (sh[i] >= '0' && sh[i] <= '9')
            s[i] = sh[i] - '0';
    }
    nfp = 0;
    nst = 0;
    i = 0;
    while (i < n) {
        x = s[i];
        if (x >= 0) {
            nr = 0;
            while (i < n && s[i] >= 0) {
                nr = nr * 10 + s[i];
                i++;
            }
            nfp++;
            fp[nfp] = nr;
        }
        else {
            while (i < n && s[i] < 0) {
                x = s[i];
                if (x == -5) {
                    nst++;
                    st[nst] = x;
                }
                else if (x >= -2) {
                    while (nst > 0 && st[nst] >= -2) {
                        nfp++;
                        fp[nfp] = st[nst];
                        nst--;
                    }
                    nst++;
                    st[nst] = x;
                }
                else if (x >= -4) {
                    while (nst > 0 && st[nst] >= -4) {
                        nfp++;
                        fp[nfp] = st[nst];
                        nst--;
                    }
                    nst++;
                    st[nst] = x;
                }
                else {
                    while (nst > 0 && st[nst] != -5) {
                        nfp++;
                        fp[nfp] = st[nst];
                        nst--;
                    }
                    nst--;
                }
                i++;
            }
        }
    }
    while (nst > 0) {
        nfp++;
        fp[nfp] = st[nst];
        nst--;
    }
    //for (i = 1; i <= nfp; i++)
      //  printf ("%d ", fp[i]);

    nst = 0;
    for (i = 1; i < NMAX; i++)
        st[i] = 0;
    nfp++;
    fp[nfp] = -3;

   // dei = 1;
    //while (fp[i] == '-')
    //    dei = -dei;
    for (i = 0; i <= nfp; i++) {
        if (fp[i] >= 0) {
            nst++;
            st[nst] = fp[i];
            dei = 1;
        }
        else {
            nst--;
            if (fp[i] == -1)
                st[nst] *= st[nst + 1];
            if (fp[i] == -2)
                st[nst] /= st[nst + 1];
            if (fp[i] == -3)
                st[nst] += st[nst + 1];
            if (fp[i] == -4)
                st[nst] -= st[nst + 1];
        }
    }
    if (st[0] != 0)
        printf ("%d", st[0]);
    else
        printf ("%d", st[1]);
   // else
   // printf ("%d", st[0]);

    return 0;
}