@testset "377.combination-sum-iv.jl" begin
    @test combination_sum4([1, 2, 3], 4) == 7
    @test combination_sum4([9], 3) == 0
    @test combination_sum4([10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140,
                            150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, 270,
                            280, 290, 300, 310, 320, 330, 340, 350, 360, 370, 380, 390, 400,
                            410, 420, 430, 440, 450, 460, 470, 480, 490, 500, 510, 520, 530,
                            540, 550, 560, 570, 580, 590, 600, 610, 620, 630, 640, 650, 660,
                            670, 680, 690, 700, 710, 720, 730, 740, 750, 760, 770, 780, 790,
                            800, 810, 820, 830, 840, 850, 860, 870, 880, 890, 900, 910, 920,
                            930, 940, 950, 960, 970, 980, 990, 111], 999) == 1
end
