... order of "easiness" may not be proper. You can look DACU of these problems on Uhunt.
10684, 11063, 10260, 12854, 12748, 12243, 12770, 333, 11634, 11687, 11588, 11565, 10878, 10773, 10703, 10188, 496, 640, 644, 10200, 489, 10141, 457, 10784, 10849, 10879, 10922, 11034, 11078, 11292, 11364, 11661 ...