Created
December 13, 2020 10:15
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aoc 2020 day 11
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@rows = {} | |
File.open('input.real.txt').read.split("\n").compact.each_with_index do |row, index| | |
@rows[index] = {} | |
row.each_char.with_index do |element, element_index| | |
@rows[index][element_index] = element | |
end | |
end | |
@last_row = @rows.keys.last | |
@last_column = @rows[0].keys.last | |
def get_seats_around_ignoring_floor(row_index, seat_index, direction_row: 1, direction_seat: 1) | |
row = row_index | |
seat = seat_index | |
loop do | |
row += direction_row | |
seat += direction_seat | |
next if @comparision_rows.dig(row, seat) == '.' | |
return @comparision_rows.dig(row, seat) | |
end | |
end | |
def get_seats_around(row_index, seat_index) | |
[ | |
get_seats_around_ignoring_floor(row_index, seat_index, direction_row: -1, direction_seat: -1), | |
get_seats_around_ignoring_floor(row_index, seat_index, direction_row: -1, direction_seat: 0), | |
get_seats_around_ignoring_floor(row_index, seat_index, direction_row: -1, direction_seat: 1), | |
get_seats_around_ignoring_floor(row_index, seat_index, direction_row: 0, direction_seat: -1), | |
get_seats_around_ignoring_floor(row_index, seat_index, direction_row: 0, direction_seat: 0), | |
get_seats_around_ignoring_floor(row_index, seat_index, direction_row: 0, direction_seat: 1), | |
get_seats_around_ignoring_floor(row_index, seat_index, direction_row: 1, direction_seat: -1), | |
get_seats_around_ignoring_floor(row_index, seat_index, direction_row: 1, direction_seat: 0), | |
get_seats_around_ignoring_floor(row_index, seat_index, direction_row: 1, direction_seat: 1), | |
].compact | |
end | |
def seat_people! | |
@rows.each do |row_index, row| | |
row.each do |seat_index, seat| | |
if seat == 'L' | |
if get_seats_around(row_index, seat_index).all? { |other_seat| other_seat == 'L' || other_seat == '.' } | |
@rows[row_index][seat_index] = '#' | |
end | |
elsif seat == '#' | |
if get_seats_around(row_index, seat_index).select { |other_seat| other_seat == '#' }.size > 5 | |
@rows[row_index][seat_index] = 'L' | |
end | |
end | |
end | |
end | |
end | |
@replaced_rows = '' | |
@originial_rows = '' | |
index = 0 | |
@comparision_rows = @rows.collect do |key, value| | |
[key, value.collect { |k,v| [k,v] }.to_h] | |
end.to_h | |
@originial_rows = @rows.values.collect { |rows| rows.values.join }.join("\n") | |
seat_people! | |
puts @rows.values.collect { |rows| rows.values.join }.join("\n") | |
while(@originial_rows != @replaced_rows) do | |
@originial_rows = @rows.values.collect { |rows| rows.values.join }.join("\n") | |
@comparision_rows = @rows.collect do |key, value| | |
[key, value.collect { |k,v| [k,v] }.to_h] | |
end.to_h | |
seat_people! | |
index += 1 | |
@replaced_rows = @rows.values.collect { |rows| rows.values.join }.join("\n") | |
puts "" | |
puts @rows.values.collect { |rows| rows.values.join }.join("\n") | |
end | |
puts @rows.values.collect { |rows| rows.values.join }.join.each_char.to_a.tally |
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