cf C. Secrets

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

 1 #include <cstdio>

 2 #include <iostream>

 3 #include <cstring>

 4 #include <algorithm>

 5 using namespace std;

 6 

 7 long long n;

 8 int main()

 9 {

10     cin>>n;

11     while(n%3==0)

12     {

13         n/=3;

14     }

15     cout<<n/3+1<<endl;

16     return 0;

17 }

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