#include <stdio.h>
#include <bits/stdc++.h>

#define rep(i, n) for(int i = 0; i < (int)(n); i++)

using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
// const int INF = 0x3f3f3f3f;

ifstream fin {"evaluare.in"};
ofstream fout {"evaluare.out"};

struct Result {
  int num;
  size_t pos;
};

Result eval(const string &s, size_t i) {
  stack<char> op[2];  // + or -
                      // * or /
  stack<int> num;
  int d = 0;
  while(i < s.size()) {
    bool process = false;
    if (s[i] == ')') {
      i++;
      break;
    } else if ('0' <= s[i] && s[i] <= '9') {
      d = 0;
      while('0' <= s[i] && s[i] <= '9') {
        d = d*10 + s[i] - '0';
        i++;
      }
      num.push(d);
      process = true;
    } else if (s[i] == '+' || s[i] == '-') {
      op[0].push(s[i]);
      i++;
    } else if (s[i] == '*' || s[i] == '/') {
      op[1].push(s[i]);
      i++;
    } else if (s[i] == '(') {
      i++;
      auto result = eval(s, i);
      d = result.num;
      i = result.pos;
      num.push(d);
      process = true;
    }
    if (process) {
      for(int x = 1; x >= 0; x--) {
        auto &opp = op[x];
        while(!opp.empty()) {
          char c = opp.top(); opp.pop();
          int y = num.top(); num.pop();
          int x = num.top(); num.pop();
          switch(c) {
            case '+':
              num.push(x+y); break;
            case '-':
              num.push(x-y); break;
            case '*':
              num.push(x*y); break;
            case '/':
              num.push(x/y); break;
          }
        }
      }
    }
  }
  return Result{num.top(), i};
}

int main(void) {
  // freopen("evaluare.in", "r", stdin);
  std::ios_base::sync_with_stdio(false);
  std::cin.tie(NULL);
  string str;
  fin >> str;

  auto res = eval(str, 0);
  fout << res.num << '\n';

  return 0;
}