#include <iostream>

#include <fstream>
#include <string>
#include <stack>
#include <vector>
#include <cctype>

using namespace std;

void read_input(const char *filename, string &text)
{

ifstream f(filename);
f >> text;
f.close();
}

void write_output(const char *filename, int result)

{
ofstream f(filename);
f << result << endl;
f.close();
}

void apply_op(char op, stack<int> &output)
{
int y = output.top();
output.pop();
int x = output.top();
output.pop();

switch (op) {
case '+':
output.push(x + y);
break;

case '-':
output.push(x - y);
break;

case '*':
output.push(x * y);
break;

case '/':
output.push(x / y);
break;


default:
break;

}
}

void solve_problem(const string &text, int &result)
{
stack<unsigned char> middle;
stack<int> output;

for (size_t i = 0; i < text.size(); i++) {
unsigned char ch = (unsigned char) text[i];
if (isdigit(ch)) {
int x = ch - '0';
for (;;) {
ch = (unsigned char) text[i + 1];
if (isdigit(ch)) {
x = 10 * x + (ch - '0');
i++;
} else {
break;
}
}
output.push(x);
} else if (ch == '(') {
middle.push(ch);
} else if (ch == ')') {
for (;;) {
char op = middle.top();
middle.pop();
if (op == '(')
break;
apply_op(op, output);
}
} else {
if (ch == '*' || ch == '/') {
while (!middle.empty()) {
char op = middle.top();
if (op == '*' || op == '/') {
middle.pop();
apply_op(op, output);
} else {
break;
}
}
} else {
while (!middle.empty()) {
char op = middle.top();
if (op != '(' && op != ')') {
middle.pop();
apply_op(op, output);
} else {
break;
}
}
}
middle.push(ch);
}
}
while (!middle.empty()) {
char op = middle.top();
middle.pop();
apply_op(op, output);
}

result = output.top();
}

int main()
{
int result;
string text;

read_input("evaluare.in", text);
solve_problem(text, result);
write_output("evaluare.out", result);

return 0;
}