#include <iostream>
#include <string>
#include <stack>
	
#include <cstring>
#include <fstream>
#include <string>
#include <stack>
	

using namespace std;

ifstream fin("evaluare.in");
ofstream fout("evaluare.out");#include <iostream>


int precedence(char op){
    if(op == '+'||op == '-')
    return 1;
    if(op == '*'||op == '/')
    return 2;
    return 0;
}
 
// Function to perform arithmetic operations.
int applyOp(int a, int b, char op){
    switch(op){
        case '+':  
            return a + b;
            break;
        case '-': 
            return a - b;
        case '*': 
             return a * b;
             break;
        case '/':
             return a / b;
             break;
    }
 
}

int evaluare(string expr){
    int i;
     
   
    stack <int> values;
     
    stack <char> ops;
     
    for(i = 0; i < expr.length(); i++){
         
    
        if(expr[i] == ' ')
            continue;
         
        else if(expr[i] == '('){
            ops.push(expr[i]);
        }
         

        else if(isdigit(expr[i])){
            int val = 0;
             
            while(i < expr.length() &&
                        isdigit(expr[i]))
            {
                val = (val*10) + (expr[i]-'0');
                i++;
            }
             
            values.push(val);
    
              i--;
        }
  
        else if(expr[i] == ')')
        {
            while(!ops.empty() && ops.top() != '(')
            {
                int val2 = values.top();
                values.pop();
                 
                int val1 = values.top();
                values.pop();
                 
                char op = ops.top();
                ops.pop();
                 
                values.push(applyOp(val1, val2, op));
            }
             
            // pop opening brace.
            if(!ops.empty())
               ops.pop();
        }
        
        else
        {
            
            while(!ops.empty() && precedence(ops.top())
                                >= precedence(expr[i])){
                int val2 = values.top();
                values.pop();
                 
                int val1 = values.top();
                values.pop();
                 
                char op = ops.top();
                ops.pop();
                 
                values.push(applyOp(val1, val2, op));
            }
             
  .
            ops.push(expr[i]);
        }
    }
     
    while(!ops.empty()){
        int val2 = values.top();
        values.pop();
                 
        int val1 = values.top();
        values.pop();
                 
        char op = ops.top();
        ops.pop();
                 
        values.push(applyOp(val1, val2, op));
    }
     
    return values.top();
}

int main() {
	string s;
	fin >> s;
	fout << evaluare(expr);
	return 0;
}