#include <cstdio>

using namespace std;

const int MAX = 100001;
char S[MAX], *p = S;

int termen();
int factor();

int eval() {
    int r = termen();
    while(*p == '-' || *p == '+') {
        if(*p == '-')
            ++p, r -= termen();
        else ++p, r += termen();
    }
    return r;
}


int termen() {
    int r = factor();
    while(*p == '*' || *p == '/') {
        if(*p == '*')
            ++p, r *= termen();
        else ++p, r /= termen();
    }
    return r;
}

int factor() {
    int r = 0;
    if(*p == '(') {
        ++p;
        r = eval();
        ++p;
    } else
        while(*p >= '0' && *p <= '9') {
            r = r*10 + *p - '0';
            ++p;
        }
    return r;
}

int main()
{
    freopen("evaluare.in", "r", stdin);
    freopen("evaluare.out", "w", stdout);
    gets(S);
    printf("%i", eval());
    return 0;
}