map <int, string> mp;
string s;

int random (int l, int r) {
 return rand() * rand() % (l+r-1);
}

int main () {
 srand (time (0));
 int i = 0;
 while (cin >> s) {
  mp[++i] = s;
 }
 int qaq = random (1, i);
 cout << qaq << endl;
 return 0;
}