53 lines
998 B
Ruby
53 lines
998 B
Ruby
|
matrix = []
|
||
|
|
linenum = 0
|
||
|
|
ARGF.lines("\n") do |line|
|
||
|
|
matrix[linenum] = Array.new
|
||
|
|
line.split.each do |str|
|
||
|
|
matrix[linenum] << str.to_i
|
||
|
|
end
|
||
|
|
linenum += 1
|
||
|
|
end
|
||
|
|
|
||
|
|
max = 0
|
||
|
|
max = 0;
|
||
|
|
#Left and right
|
||
|
|
(0..19).each do |y|
|
||
|
|
(0..16).each do |x|
|
||
|
|
cmp = matrix[y][x] * matrix[y][x + 1] * matrix[y][x + 2] * matrix[y][x + 3];
|
||
|
|
if (cmp > max)
|
||
|
|
max = cmp
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
#Vertical
|
||
|
|
(0..16).each do |y|
|
||
|
|
(0..19).each do |x|
|
||
|
|
cmp = matrix[y][x] * matrix[y + 1][x] * matrix[y + 2][x] * matrix[y + 3][x];
|
||
|
|
if (cmp > max)
|
||
|
|
max = cmp
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
#Diagonally left->down
|
||
|
|
(0..16).each do |y|
|
||
|
|
(0..16).each do |x|
|
||
|
|
cmp = matrix[y][x] * matrix[y + 1][x + 1] * matrix[y + 2][x + 2] * matrix[y + 3][x + 3];
|
||
|
|
if (cmp > max)
|
||
|
|
max = cmp
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
#Diagonally right->down
|
||
|
|
(0..16).each do |y|
|
||
|
|
(3..19).each do |x|
|
||
|
|
cmp = matrix[y][x] * matrix[y + 1][x - 1] * matrix[y + 2][x - 2] * matrix[y + 3][x - 3];
|
||
|
|
if (cmp > max)
|
||
|
|
max = cmp
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
puts max
|