#include<cstdio>
using namespace std;
const long Max=100010;
char S[Max], *p=S;
long termen();
long factor();
   long eval() {
    long r = termen();
    while ( *p=='+' || *p=='-' ) {
        switch ( *p ) {
             case '+':
                ++p;
                r += termen();
                break;
            case '-':
                ++p;
                 r -= termen();
                break;
        }
    }
    return r;
}
long termen() {
    long r = factor();
    while ( *p=='*' || *p=='/' ) {
        switch ( *p ) {
            case '*' :
                ++p;
                r *= factor();
                break;
            case '/':
                ++p;
                r /= factor();
                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"));
    long K = eval();
    freopen ("evaluare.out", "w", stdout);
    printf("%ld\n", K);
    //fprintf(fopen("evaluare.out", "w"), "%ld\n", eval());
    return 0;
}