ShareMyScreen/ProjectEuler/0011
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In the grid below, four numbers along a diagonal line have been marked in red.
NB.greatest item
NB.│ take the product overlappingly of every 4 items
NB.│ │ unbox the items
NB.│ │ │ row-wise box the array, its transpose, and both sets of its diagonals
NB.│ │ │ │ bring list to proper shape
NB.│ │ │ │ │ convert string to numbers
NB.│ │ │ │ │ │ convert all linefeed characters to space ones
NB.│ │ │ │ │ │ │ paste the selected array
NB.│__ │___ │ │__________________________ │______ │_ │____________________ │______________
>./ 4*/\ ; (<"1/.@|.,<"1/.,<"1,<"1@|:) 20 20&$ @ ". (]`(' '"_)@.(LF&=)"0) shell'xclip -o'