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

string X;
int ans = 0;

void f(int a, int b){
  a %= b;
  ans++;
  if(a == 0) return;
  f(b,a);
}

signed main(){
  cin>>X;
  char target = '.';
  int flag = -1;
  int P = 0;
  for(int i = 0; i < X.size(); i++){
    if(X[i] == target){
      flag = i;
    }
    else{
      int now = X[i] - '0';
      P *= 10;
      P += now;
    }
  }
  if(flag == -1){
    if(X == "1"){
      cout << 1 << "\n";
    }
    else{
      cout << 2 << "\n";
    }
  }
  else{
    int D = 1;
    for(int i = flag + 1; i < X.size(); i++){
      D *= 10;
    }
    f(D,P);
    cout << ans << "\n";
  }
}