#include <stdio.h>
#define MAX 1024

char S[MAX], *p=S;

long termen();
long factor();

long termen() {
     long r = factor();
     while ( *p == '*' || *p == '/') {
           switch ( *p ){
                  case '*' :
                       p++;
                       r *= factor();
                       break;
                  case '-' :
                       p++;
                       r /= factor();
                       break;
                  }
           }
     return r;
     }

long eval() {
     long r = termen();
          while ( *p == '+' || *p == '-') {
           switch ( *p) {
                  case '+' :
                       p++;
                       r += termen();
                       break;
                  case '-':
                       p++;
                       r -= termen();
                       break;
                  }
           }
     return r;
     }
     
long factor(){
     long r = 0;
     if ( *p == '(') {
          ++p;
          r = eval();
          ++p;
          }
     else {
          while ( *p>='0' && *p<='9') {
                r = r * 10 + *p - '0';
                p++;
                }
          }
     return r;
     }

int main() { 
    fgets(S, MAX, fopen("evaluare.in", "r"));  
    fprintf(fopen("evaluare.out", "w"), "%ld\n", eval());  
    return 0;
}