#include <bits/stdc++.h>
#define ll long long
using namespace std;
ifstream in("evaluare.in");
ofstream out("evaluare.out");
int i; string s;
ll evaluare();
ll factor()
{
    ll r = 0;
    if( s[i] == '('){ i++; r = evaluare(); i++;}
    else
    while( s[i] >='0' && s[i] <='9' )
    {
        r*=10;
        r+=s[i] -'0';
        i++;
    }
    return r;
}

ll termen()
{
    ll r = factor();
    while( s[i] == '*' || s[i] == '/' )
    {
        i++;
        switch( s[i-1])
        {
            case '*' : r*=factor(); break;
            case '/' : r/= factor(); break;
        }
    }
    return r;
}

ll evaluare()
{
    ll r = termen();
    while( s[i] == '+' || s[i] == '-' )
    {
        i++;
        switch(s[i-1])
        {
            case '-': r-=termen(); break;
            case '+': r+= termen(); break;
        }
    }
    return r;
}

int main()
{
    ios::sync_with_stdio(0);
    in >> s;
    out << evaluare();
    return 0;
}