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

void O_o()
{
  string s;
  cin>>s;
  int n=s.size();
  cout<<n/2+1;
}
signed main()
{
  // freopen(".in","r",stdin);
  // freopen(".out","w",stdout);
  int t=1;
  //cin>>t;
  while(t--)  O_o();
  return 0;
}