#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using ll = long long;
#define rep(i, s, t) for (ll i = s; i < (ll)(t); i++)
#define all(x) begin(x), end(x)

template <class T> bool chmin(T& x, T y) {
	return x > y ? (x = y, true) : false;
}
template <class T> bool chmax(T& x, T y) {
	return x < y ? (x = y, true) : false;
}

struct io_setup {
	io_setup() {
		ios::sync_with_stdio(false);
		cin.tie(nullptr);
		cout << fixed << setprecision(15);
	}
} io_setup;

using mint = atcoder::modint998244353;
using i128 = __int128_t;

void solve() {
	string s;
	cin >> s;
	ll p = 0, q = 0;
	for (char c : s) {
		if (c == '.') q = 1;
		else {
			p *= 10;
			p += c - '0';
			q *= 10;
		}
	}
	chmax(q, 1ll);
	ll cnt = 0;
	while (p > 0) {
		swap(p, q);
		p %= q;
		cnt++;
	}
	cout << cnt << '\n';
}

int main() {
	int t = 1;
	// cin >> t;
	while (t--) solve();
}