#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>
#define MAXN 101
char s[MAXN];
int calac(int L, int R){
int i, p = -1, lv = 0;
int m = 0;
for (i = L; i <= R; i++){
switch (s[i]){
case '(': lv++; break;
case ')': lv--; break;
case '+':
case '-':
if(!lv) p = i; break;
case '*':
case '/':
if(!lv && p == -1) p = i;
break;
default:
m = m * 10 + s[i] - '0';
}
}
if (p == -1)
return s[L] == '(' ? calac(L + 1, R - 1) : m;
int a1 = calac(L, p - 1), a2 = calac(p + 1, R);
switch (s[p]){
case '+': return a1 + a2;
case '-': return a1 - a2;
case '*': return a1 * a2;
case '/': return a1 / a2;
}
}
int main(){
gets(s);
printf("%d\n", calac(0, strlen(s) - 1));
system("pause");
return 0;
}