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added 71 characters in body

edited Nov 16, 2018 at 21:06

edited Nov 16, 2018 at 21:06

APL (Dyalog Extended), 1719 bytes

{⍵[⍒⍵[⍒∪ ̈(∨' ̄'~⍨⍕) ̈⍵]}

Fixed at a cost of +2 bytes thanks to OP.

{⍵[⍒(∨' ̄'~⍨⍕) ̈⍵]}

{⍵[⍒∪ ̈(∨' ̄'~⍨⍕) ̈⍵]}

Fixed at a cost of +2 bytes thanks to OP.

answered Nov 16, 2018 at 17:01

answered Nov 16, 2018 at 17:01

{⍵[⍒(∨' ̄'~⍨⍕) ̈⍵]}