#include <fstream>
#include <queue>
#include <vector>

using namespace std;

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

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

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

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

int operatie(int a, int b, char op) {
    switch(op) {
        case '+' : return a + b ;
        case '-' : return a - b ;
        case '*' : return a * b ;
        case '/' : return a / b ;

    }
}

int rezolva(string &exp) {
    vector <char> operaThori ;
    vector <int> operanzi ;
    for (int i = 0 ; i < exp.size() ; ++i ) {
        char c = exp[i] ;
        if (operand(c)) {
            int num = 0 ;
            while ('0' <= exp[i] && exp[i] <= '9') {
				num = num * 10 + exp[i] - '0';
				i++;
			}
			operanzi.push_back(num);
			c = exp[i];
        }
        if ( c == '(' ) {
             operaThori.push_back(c) ;
             continue ;
        }
        if ( c == ')' ) {
            while(!operaThori.empty()) {
                char op = operaThori.back();
                operaThori.pop_back();
                if ( op == '(' )
                        break ;
                else {
                    int operand2 = operanzi.back();
					operanzi.pop_back();
					int operand1 = operanzi.back();
					operanzi.pop_back();
					operanzi.push_back(operatie(operand1, operand2, op));
                }
            }
            continue;
        }
        if (operaThor(c)) {
            if(operaThori.empty())
                operaThori.push_back(c) ;
            else {
                while (prioritate(operaThori.back()) >= prioritate(c)) {
                    char op = operaThori.back();
                    operaThori.pop_back();
                    int operand2 = operanzi.back();
					operanzi.pop_back();
					int operand1 = operanzi.back();
					operanzi.pop_back();
					operanzi.push_back(operatie(operand1, operand2, op));
					if(operaThori.empty())
                        break ;
                }
                operaThori.push_back(c);
            }
        }
    }
    while(!operaThori.empty()){
            char op = operaThori.back();
            operaThori.pop_back();
            int operand2 = operanzi.back();
            operanzi.pop_back();
            int operand1 = operanzi.back();
            operanzi.pop_back();
            operanzi.push_back(operatie(operand1, operand2, op));
    }
    return operanzi.back();


}

int main()
{
    string exp ;
    fin >> exp ;
    fout << rezolva(exp) ;

}