#include <stdio.h>
#include <vector>
#include <string.h>
#define MAX 100001
using namespace std;
 
vector<char> s;
char expr[MAX];
int a, b;
vector<int> v;
 
int eval(char op){
    b = v.back();
    v.pop_back();
    a = v.back();
    v.pop_back();
    switch(op){
        case '*': return a * b; break;
        case '+': return a + b; break;
        case '-': return a - b; break;
        default: return a / b;
    }
}
 
int main(){
    freopen("evaluare.in", "r", stdin);
    freopen("evaluare.out", "w", stdout);
    scanf("%s", expr);
 
    int x = 0, i;
    int lung = strlen(expr);
 
    for(i = 0; i < lung; i++){
        if('0' <= expr[i] && expr[i] <= '9')
            x = 10 * x + expr[i] - '0';
         
        else{
            if(i > 0 && '0' <= expr[i - 1] && expr[i - 1] <= '9'){
                v.push_back(x);
                x = 0;
            }
 
            if(expr[i] == '(')
                s.push_back(expr[i]);
 
            else if(expr[i] == ')'){
                while(s.back() != '('){
                    v.push_back(eval(s.back()));
                    s.pop_back();
                }
                s.pop_back();
            }
 
            else if(expr[i] == '*' || expr[i] == '/'){
                while(!s.empty() && (s.back() == '*' || s.back() == '/')){
                    v.push_back(eval(s.back()));
                    s.pop_back();
                }
                s.push_back(expr[i]);
            }
 
            else if(expr[i] == '+' || expr[i] == '-'){
                while(!s.empty() && s.back() != '('){
                    v.push_back(eval(s.back()));
                    s.pop_back();
                }
                s.push_back(expr[i]);
            }
        }
    }
 
    if(x != 0)
        v.push_back(x);
     
    while(!s.empty()){
        v.push_back(eval(s.back()));
        s.pop_back();
    }
    printf("%d\n", v.back());
    return 0;
}