#include<bits/stdc++.h>
using namespace std;
int main(){
  string s;
  cin >> s;
  set<pair<int, int> > podciag;
  for(long long i = 0, q = 1000000021, qq = 1000000097;i < s.size();i++){
    long long h = 0, H = 0, p = 1, pp = 1;
    for(long long j = i;j < s.size();j++){
      h = (h + s[i] * p) % q;
      H = (h + s[i] * pp) % q;
      p = (p * 997) % q;
      pp = (pp * 1223) % q;
      podciag.insert(make_pair(h, H));
    }
  }
  cout << podciag.size();
}