#include<bits/stdc++.h>
using namespace std;

const int NMax = 100010;
char S[NMax], *p = S;

long termen();
long factor();
bool isNumber(int x)
{
    if(x >= '0' && x <= '9') return true;
    else return false;
}

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 ( isNumber(*p) )  {
            r = r*10 + *p - '0';
            ++p;
        }
    }
    return r;
}


int main()
{
    ifstream in("evaluare.in");
    in>>S;
    in.close();
    ofstream out("evaluare.out");
    out<<eval();
    return 0;
}