#include <cstdio>
#include <cstdlib>
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;
}

FILE *f=freopen("evaluare.in","r",stdin);
FILE *g=freopen("evaluare.out","w",stdout);

int main() {
    long Size;
    fseek (f , 0 , SEEK_END);
    Size = ftell (f);
    rewind(f);
    fread(S, 1, Size, f);
    printf("%ld\n", eval());
    return 0;
}