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http://projecteuler.net/problem=31
In England the currency is made up of pound, £, and pence,
p, and there are eight coins in general circulation:
1p, 2p, 5p, 10p, 20p, 50p, £1 (100p) and £2 (200p).
It is possible to make £2 in the following way:
1×£1 + 1×50p + 2×20p + 1×5p + 1×2p + 3×1p
How many different ways can £2 be made using any number of
coins?
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import cp.
main =>
Vars = [A, B, C, D, E, F, G, H],
Vars :: 0 .. 200,
1 * A + 2 * B + 5 * C + 10 * D + 20 * E + 50 * F + 100 * G + 200 * H #= 200,
println(solve_all(Vars).length).