#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
  int a;
  cin >> a;
  ll ans = 0ll;
  while (a != 1) {
  	if (a%2 == 0) a /= 2;
  	else a = (a+a+a+1);
  	ans++;
  	if (ans > 9999999) cout << "infinity" << endl;
  }
  cout << ans << endl;
}