cf C. Secrets

http://codeforces.com/contest/334/problem/C

 #include <cstdio>
 #include <iostream>
 #include <cstring>
 #include <algorithm>
 using namespace std;

 long long n;
 int main()
 {
     cin>>n;
     while(n%==)
     {
         n/=;
     }
     cout<<n/+<<endl;
     return ;
 }