pb032.jl

module Problem032

using ..ProjectEulerLibrary


"""
    problem032()

Problem 032 of Project Euler.

https://projecteuler.net/problem=032
"""
function problem032()
    pandigital_products = Int[]
    for n in 1:99, m in 1:10000
        x = concat(n, m, n * m)
        ndigits(x) ≠ 9 && continue
        ispandigital(x; zeroless=true) && push!(pandigital_products, n * m)
    end

    unique!(pandigital_products)
    return sum(pandigital_products; init=0)
end


export problem032
end  # module Problem032
using .Problem032
export problem032