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#define DRESEP_CLASSES 81
STATIC uint64_t coord_dresep_nosym(cube_t);
STATIC cube_t invcoord_dresep_nosym(uint64_t);
STATIC cube_t coordinate_dreo_merge(cube_t, cube_t);
STATIC uint64_t coordinate_dreo_coord(cube_t, const unsigned char *);
STATIC cube_t coordinate_dreo_cube(uint64_t, const unsigned char *);
STATIC bool coordinate_dreo_isnasty(uint64_t, const unsigned char *);
STATIC size_t coordinate_dreo_gendata(unsigned char *);
STATIC bool is_dreo_solvable(cube_t);
STATIC coord_t coordinate_dreo = {
.name = "DREO",
.coord = &coordinate_dreo_coord,
.cube = &coordinate_dreo_cube,
.isnasty = &coordinate_dreo_isnasty,
.gendata = coordinate_dreo_gendata,
.max = DRESEP_CLASSES * POW_3_7,
.trans_mask = TM_UDRLFIX,
.moves_mask_gendata = MM18_EO,
.moves_mask_solve = MM18_EO,
.is_admissible = &solution_lastqt_cw,
.is_solvable = &is_dreo_solvable,
.is_solved = NULL,
.allow_niss = true,
.pruning_distribution = {
[0] = 1,
[1] = 1,
[2] = 4,
[3] = 22,
[4] = 160,
[5] = 1286,
[6] = 8550,
[7] = 42152,
[8] = 90748,
[9] = 33466,
[10] = 757,
},
.pruning_max = 10,
.sym = {
.classes = DRESEP_CLASSES,
.max = COMB_12_4,
.coord = &coord_dresep_nosym,
.cube = &invcoord_dresep_nosym,
.max2 = POW_3_7,
.coord2 = &coord_co,
.cube2 = &invcoord_co,
.merge = &coordinate_dreo_merge,
},
};
STATIC uint64_t
coord_dresep_nosym(cube_t cube)
{
return coord_esep(cube) / COMB_8_4;
}
STATIC cube_t
invcoord_dresep_nosym(uint64_t coord)
{
return invcoord_esep(coord * COMB_8_4);
}
STATIC cube_t
coordinate_dreo_merge(cube_t c1, cube_t c2)
{
cube_t merged;
merged = c1;
copy_corners(&merged, c2);
return merged;
}
STATIC uint64_t
coordinate_dreo_coord(cube_t cube, const unsigned char *data)
{
return coord_coord_generic(&coordinate_dreo, cube, data);
}
STATIC cube_t
coordinate_dreo_cube(uint64_t i, const unsigned char *data)
{
return coord_cube_generic(&coordinate_dreo, i, data);
}
STATIC bool
coordinate_dreo_isnasty(uint64_t i, const unsigned char *data)
{
return coord_isnasty_generic(&coordinate_dreo, i, data);
}
STATIC size_t
coordinate_dreo_gendata(unsigned char *data)
{
return coord_gendata_generic(&coordinate_dreo, data);
}
STATIC bool
is_dreo_solvable(cube_t cube) {
uint8_t c[8], e[12], i, cocount;
if (coord_eo(cube) != 0)
return false;
pieces(&cube, c, e);
for (i = 0, cocount = 0; i < 8; i++)
cocount += (c[i] & COBITS_2) >> COSHIFT;
return cocount % 3 == 0;
}
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