63 3d object on photos

by kokaku

65 Strategy = a way to a victory

by Arsen Shnurkov

71 Reverse . Phase rupture

by mossad_re

72 Material for learning

by BadCats

74 "Grid" = DAG?

by Arsen Shnurkov

77 To group indexes

by SergASh

81 List grouping

by okon

87 Detection

by Chorkov