#include <fstream>
#include <iostream>
#include <string>
#include <vector>
#define MAX 100010

using namespace std;
string NUM("1234567890");

vector<string> parse (string s){
	vector<string> toks;
	string curr_number;

	for(auto c:s){
		if(NUM.find(c) != -1){
			curr_number.push_back(c);
		}
		else{
			if(!curr_number.empty()){
				toks.push_back(curr_number);
				curr_number = "";
			}
			toks.push_back(string(1, c));
		}
	}
	if(!curr_number.empty()){
				toks.push_back(curr_number);
				curr_number = "";
			}

	return toks;
}

int where, len;
vector<string> toks;

int factor();

int term();

int eval(){
	//cout << "eval call: " << where << endl;
	int t = term();
	while(toks[where] == "+" || toks[where] == "-"){
		if(toks[where++] == "+"){
			//cout << "ok" << endl;
			t = t + term();
		}
		else{
			t = t - term();
		}
	}

	//cout << "eval call result: " << t << endl;
	return t;
}

int term(){
	//cout << "term call: " << where << endl;
	int f = factor();
	int ans;
	while(toks[where] == "*" || toks[where] == "/"){
		if(toks[where++] == "*")
			f = f * factor();
		else
			f = f / factor();
	}

	//cout << "term call result: " << f << endl;
	return f;
}

int factor(){
	int a;
	//cout << "factor call: " << where << " toks: " << toks[where] << endl;
	if(toks[where] == "("){
		++where;
		a = eval();
		++where;
	}
	else{
		a = stoi(toks[where]);
		++where;
	}
	//cout << "factor call result: " << a << endl;
	return a;
}

int main(){
	ifstream fin;
	ofstream fout;
	fin.open("evaluare.in");
	fout.open("evaluare.out");
	string s;
	getline(fin, s);
	//cout << s << endl;
	toks = parse(s);
	toks.push_back(")");
	fout << eval();

}