#include <bits/stdc++.h>
#include <fstream>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
template<class T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
struct custom_hash {static uint64_t splitmix64(uint64_t x) {x += 0x9e3779b97f4a7c15;x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;x = (x ^ (x >> 27)) * 0x94d049bb133111eb;return x ^ (x >> 31);}size_t operator()(uint64_t x) const {static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();return splitmix64(x + FIXED_RANDOM);}};
string __fname = "evaluare"; ifstream in (__fname + ".in"); ofstream out (__fname + ".out"); 
#define cin in 
#define cout out
#define int64 long long
#define uint64 unsigned long long
#define x first
#define y second
#define pb push_back
#define pii pair <int, int> 
#define pii64 pair <int64, int64>
#define db(x) cout << "> " << #x << ": " << (x) << "\n"
#define qr queries()
#define yn(x) if (x) {ctn("Yes");}else {ctn("No");}
void solve(int);
void queries(){int n;cin >> n;for (int i = 1; i <= n; i++) solve(i);}
template<class T>T ceildiv(T a, T b) {return a / b + !!(a % b);}
template<class T>T gcd (T a, T b){return (b ? gcd(b, a % b): a);}
template<class T>T lcm (T a, T b){return a * b / gcd(a, b);}
// // // // // // // // // // // // // // // // // // // // // // 
/*                  TEMPLATE - VANILLA                         */
// // // // // // // // // // // // // // // // // // // // // //
const int ddx[] = {-1, -1, 0, 1, 1, 1, 0, -1};
const int ddy[] = {0, 1, 1, 1, 0, -1, -1, -1};
const int dx[] = {-1, 0, 1, 0};
const int dy[] = {0, 1, 0, -1};
const int64 hash_inv = 940594066;
const double pi = 3.14159265359;
const int64 hash_p = 101;
const int64 mod = 1000000007;
const int maxn = 200200;
stack <int> num, op;

void solve(int id){
    
    return;
}

int priority (char c1) {
    if (c1 == '*' || c1 == '/') return 2;
    if (c1 == '+' || c1 == '-') return 1;
    return 0;
}

void calc () {
    int n1 = num.top(); num.pop();
    int n2 = num.top(); num.pop();
    char c = op.top(); op.pop();
    if (c == '*') num.push(n1 * n2);
    else if (c == '+') num.push(n1 + n2);
    else if (c == '-') num.push(n2 - n1);
    else if (c == '/') num.push(n2 / n1);
}

bool operation(char c) {
    return (c == '/' || c == '-' || c == '+' || c == '*');
}


int main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout << fixed; cout << setprecision(10); 
    string s;
    cin >> s;
    for (int i = 0; i < s.size(); i++){
        if (s[i] == '(') {
            op.push('(');
        }
        else if (s[i] == ')') {
            while (op.top() != '(') {
                calc();
            }
            op.pop();
        }
        else if (operation(s[i])) {
            while (!op.empty() && priority(op.top()) >= priority(s[i])) {
                calc();
            }
            op.push(s[i]);
        }
        else {
            int val = 0;
            while (i < s.size() && s[i] >= '0' && s[i] <= '9') {
                val = val * 10 + s[i++] - '0';
            }
            i--;
            num.push(val);
        }
    }
    while (!op.empty()) {
        calc();
    }
    cout << num.top();
    return 0;
}