matrix representation of a graph failure ( https://adventofcode.com/2019/day/6 )
JVERSION Engine: j901/j64avx2/windows Release-c: commercial/2020-01-11T13:29:14 Library: 9.01.22 Platform: Win 64 Installer: J901 install InstallPath: c:/program files/j901 Contact: www.jsoftware.com I=:_2]\0 1 2 3 4 5 6 7 1 0 3 2 5 4 7 6 1 I } 8 8 $ 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 1 I } 1 $. 8 8 ; 0 1 ; 0 0 0 | 1 0 1 | 1 0 2 | 1 (snip) 7 3 | 1 7 4 | 1 7 5 | 1 7 6 | 1 7 7 | 1 Stay well! Dave ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm