#include <bits/stdc++.h>

using namespace std;

#define FILE_IO

const int INF = 1 << 30;
const long long LLINF = 1LL << 62;
const int mod = 1000000007;

char ch;
char opr[2][2] = {
    '+', '-',
    '*', '/'
};

int operate(int x, int y, char op)
{
    if(op == '+') return (x + y);
    if(op == '-') return (x - y);
    if(op == '*') return (x * y);
    if(op == '/') return (x / y);
    return 0;
}

bool goodoperator(int grd, char op)
{
    for(int i = 0; i <= 1; i++)
        if(opr[grd][i] == op)
            return true;
    return false;
}

int expresie(int grd)
{
    if(grd == 2)
    {
        if(ch == '(')
        {
            ch = getchar();
            int ans = expresie(0);
            ch = getchar();
            return ans;
        }
        int ans = 0;
        while('0' <= ch && ch <= '9')
        {
            ans = ans * 10 + ch - '0';
            ch = getchar();
        }
        return ans;
    }

    int ans = expresie(grd + 1);
    while( goodoperator(grd, ch) )
    {
        char op = ch;
        ch = getchar();
        ans = operate(ans, expresie(grd + 1), op);
    }
    return ans;
}

int main()
{
    #ifdef FILE_IO
    freopen("evaluare.in", "r", stdin);
    freopen("evaluare.out", "w", stdout);
    #endif
    ch = getchar();
    printf("%d\n", expresie(0));
    return 0;
}