== code(c) |
// Sorting Big Numbers using Trie-Forest based sort indexed in a STL set (Red-Black Tree)

// copyright(c)   idea :          Serban Lupulescu
//             implementation: Mircea Dima

// copyright(c) Serban Lupulescu & Mircea Dima

// Time Complexity: O(n*max_len)
// Faculty of Mathematics and Computer Science, University of Bucharest
// :D