#include <bits/stdc++.h>
#define NMAX 100000
#include <stack>
#include <cstring>

using namespace std;

stack<int> e;
char s[NMAX+5];

void goDown()
{
    int m=e.top();
    e.pop();
    m+=e.top();
    e.pop();
    e.push(m);
}

void update(int s)
{
    int m=s+e.top();
    e.push(m);
}

int solve()
{
    int ans=0;
    int i=0;
    int x=strlen(s)-1;
    int sum=0;
    while(i<=x)
{
    if(s[i]=='(')
    {
        e.push();
    }
    else if(s[i]=='+' || s[i]=='-')
    {

    }




}

}

int main()
{
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);

    gets(s);
    int ans = solve();
    printf("%d",ans);

    return 0;
}