#include <bits/stdc++.h>
std::ifstream in("evaluare.in");
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() {
    in.getline(S,MAX);
    std::ofstream("evaluare.out")<<eval();
}