#include <fstream>
#include <iostream>
#include <vector>
#include <stack>
#include <map>
#define NMAX 100001

using namespace std;

ifstream fin("evaluare.in");
ofstream fout("evaluare.out");

char expr[NMAX];
map<char, int> priority;

struct elts {
    int val;
    int type;
};

bool isDigit(char c) {
    return (c >= '0' && c <= '9');
}

int getNumber(int& i) {
    int ret = 0;
    while (expr[i] != '\0' && isDigit(expr[i]))
        ret = ret * 10 + expr[i] - '0', ++i;
    --i;
    return ret;
}

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

int getRes(int a, int b, char op) {
    if (op == '+')
        return a + b;
    if (op == '-')
        return a - b;
    if (op == '*')
        return a * b;
    if (op == '/')
        return a / b;
}

int compute() {
    stack<char> op;
    vector<elts> val;
    for (int i = 0;expr[i] != '\0';++i) {
        if (isDigit(expr[i]))
            val.push_back({ getNumber(i),0 });
        else if (isOperator(expr[i])) {
            while (!op.empty() && op.top() != '(' && priority[op.top()] > priority[expr[i]]) {
                val.push_back({ op.top(),1 });
                op.pop();
            }
            op.push(expr[i]);
        }
        else if (expr[i] == '(')
            op.push('(');
        else {
            while (op.top() != '(') {
                val.push_back({ op.top(),1 });
                op.pop();
            }
            op.pop();
        }

    }
    while (!op.empty()) {
        val.push_back({ op.top(),1 });
        op.pop();
    }

    stack<int> res;

    for (int i = 0;i < val.size();++i) {
        if (val[i].type == 0)
            res.push(val[i].val);
        else {
            int a = res.top();
            res.pop();
            int b = res.top();
            res.pop();
            res.push(getRes(b, a, val[i].val));
        }
    }
    return res.top();
}

int main()
{
    fin >> expr;
    priority['+'] = 0;
    priority['-'] = 0;
    priority['*'] = 1;
    priority['/'] = 1;
    fout << compute();

    return 0;
}