gwerbin

                    GNU GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007

 Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

                            Preamble

  The GNU General Public License is a free, copyleft license for

gist:729557

#include <stdio.h>

typedef unsigned int U32;
typedef unsigned __int64 U64;

// ---- actual cube root code

U32 icbrt64(U64 x) {
  int s;
  U32 y;