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#! /usr/bin/ruby
def concat(a0, b0)
if (b0 == 0) then
return 10 * a0
end
a = a0
b = b0
while (b > 0) do
a *= 10;
b = (b / 10).floor
end
return a + b0
end
def concatenationvalue(a)
t = 0
0.upto(((a.length - 1) / 2).floor) do |i|
j = a.length - 1 - i
if (j == i) then
t += a[i]
else
t += concat(a[i], a[j])
end
end
return t
end
require 'test/unit'
class TestConcatenationvalue < Test::Unit::TestCase
def test_ex1
assert_equal(1286, concatenationvalue([6, 12, 25, 1]))
end
def test_ex2
assert_equal(489, concatenationvalue([10, 7, 31, 5, 2, 2]))
end
def test_ex3
assert_equal(112, concatenationvalue([1, 2, 10]))
end
end
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