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Proximity Grid

by MeWhenI , stefangimmillaro

Details

Given a series of 9x9 grids, reproduce the grid with distance set to closest source for each passible point.

OEIS on maximum snake-like path length in a NxN box.

Use base62 (0-9 A-Z a-z) to represent distance.

A valid path to a source must move vertically or horiontally along passible points.

Impassible points and points which cannot form a valid path to a source should remain unchanged.

Points on the grid can be marked as a source notated with 0.

Points on the grid can be marked as impassible notated with #.

Points on the grid can be marked as passible notated with -.

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Compiled from AT&T syntax to x86-64 Linux. Use syscalls to write output.
Top-level programs are supported, args holds ARGV. Implicit using directives for console applications are enabled.
Arguments are available via STDIN, each argument is NULL terminated. Taking input after EOF leaves the cell unchanged, the tape is circular with 65536 cells, and cells are 8-bit with wrapping.
Code is compiled with clang with -std=c++2b.
Code is compiled with LDC2.
Arguments are available via STDIN, each argument is NULL terminated. x is a no-op.
The stack is initialized with an array containing arguments, rather than the contents of STDIN.
Arguments are available via STDIN, each argument is NULL terminated.
arguments holds ARGV, print() to output with a newline, write() to output without a newline.
Code is run under -E, all current features are enabled.
$args to access the arguments.
prolog_flag(argv, Args) to access the arguments.
Arguments are available via STDIN, each argument is seperated with a null byte. The code is run with -E and -z. Output replaces null bytes with newlines.
SELECT arg FROM argv to access the arguments, only the first column of the first result set will be printed, NULL values will be skipped, and the dialect is SQLite.
Arguments are available via args list variable. To terminate script execution, write and quit the current buffer.
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