2 lines
80 B
APL
2 lines
80 B
APL
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mode←{{s←⌈/⍵[;2]⋄⊃¨(↓⍵)∩{⍵,s}¨⍵[;1]}{⍺,≢⍵}⌸⍵}
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mode←{{s←⌈/⍵[;2]⋄⊃¨(↓⍵)∩{⍵,s}¨⍵[;1]}{⍺,≢⍵}⌸⍵}
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