Coprimes Drill

function gcd(x::Int64, y::Int64)
    while (x > 0) && (y > 0)
        if x < y
            y = y % x
        else
            x = x % y
        end
    end

    return max(x, y)
end

AreCoprime(x::Int64, y::Int64) = (gcd(x, y) == 1)

function main(lo::Int64, hi::Int64)
    lo, hi = minmax(lo, hi)
    if (lo > 1e18) || (hi > 1e18) || (hi - lo > 50); error("lo and hi parameters are invalid!"); end

    for x = lo:(hi-2)
        for y = (x+1):(hi-1)

            if AreCoprime(x, y)
                for z = (y+1):hi
                    if AreCoprime(y, z) && !AreCoprime(x, z); return (x, y, z); end
                end
            end
        end
    end

    return (NaN, NaN, NaN)
end