#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (n); i++)
typedef long long ll;

int main() {
  string s;
  cin >> s;
  int n = s.size();
  if (n <= 2)
    cout << 1 << endl;
  else
    cout << n / 2 + 1 << endl;
}