include <bits/stdc++.h>

using namespace std;

int main() { string s; cin>>s; int n=0;
for(int i=1;i<=s.size();i++){ if(s[i] == '.' && s[i+1] == '0'){ n = 1; break; } } if(n == 0) cout<<"No"<<endl; else cout<<"Ok"<<endl; }