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#! /usr/bin/ruby
def lr(*s)
maxx=s.length-1;
maxy=s[0].length-1;
maxa=0;
c=Array.new;
0.upto(maxx-1) do |x|
0.upto(maxy-1) do |y|
if (s[x][y]==1)
(x+1).upto(maxx) do |tx|
(y+1).upto(maxy) do |ty|
valid=true
x.upto(tx) do |sx|
y.upto(ty) do |sy|
if (s[sx][sy] != 1)
valid=false
break
end
end
if valid==false
break
end
end
if valid
l=[tx-x+1,ty-y+1]
a=l[0]*l[1]
if (a > maxa)
maxa=a
c=l
end
end
end
end
end
end
end
if (c.length > 0)
o=Array.new
1.upto(c[0]) do
o.push([1] * c[1])
end
return o
end
return 0
end
require 'test/unit'
class TestLr < Test::Unit::TestCase
def test_ex1
assert_equal(
[
[1,1,1,1,1],
[1,1,1,1,1],
],
lr(
[0,0,0,1,0,0],
[1,1,1,0,0,0],
[0,0,1,0,0,1],
[1,1,1,1,1,0],
[1,1,1,1,1,0],
),
)
end
def test_ex2
assert_equal(
0,
lr(
[1,0,1,0,1,0],
[0,1,0,1,0,1],
[1,0,1,0,1,0],
[0,1,0,1,0,1],
),
)
end
def test_ex3
assert_equal(
[
[1,1,1,1],
[1,1,1,1],
],
lr(
[0,0,0,1,1,1],
[1,1,1,1,1,1],
[0,0,1,0,0,1],
[0,0,1,1,1,1],
[0,0,1,1,1,1],
),
)
end
end
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