$ time ./pc 6 6
the number of patterns is: 000000000000000000000000000000000000000009db3f0a5d231378f10a55ce

real	2m17.757s
user	2m17.520s
sys	0m0.100s

$ time ./pc 6 5
count_size: 38400.000000
the number of patterns is: 000000000000000000000000000000000000000000021fc250b0d1218438d068

real	0m43.734s
user	0m43.450s
sys	0m0.040s

$ time ./pc 6 4
the number of patterns is: 000000000000000000000000000000000000000000000011acd983d60a9fc37c

real	0m9.712s
user	0m9.680s
sys	0m0.000s

$ time ./pc 7 4
the number of patterns is: 000000000000000000000000000000000000000015714ebbb97b7e0882fef50c

real	6m21.945s
user	6m20.710s
sys	0m0.260s

$ time ./pc 7 6
the number of patterns is: 00000000000000000000000000000000115617f50b079b929aa76ddab1b0e24e

real	139m55.016s
user	139m29.330s
sys	0m7.910s