@testset "560.subarray-sum-equals-k.jl" begin
    @test subarray_sum([1, 1, 1], 2) == 2
    @test subarray_sum([8, 17, -26, 7, 19, -7, 0, -15, -25, -30, 22, 9, 9, 11, 6, 5, 23, -28, -8, 5, 8, 11, -11, -20, -10, -23, 17, -24, 0, -30, -8, -1, -20, -1, 2, 21, -6, -2, 22, -24, 15, 7, -26, 23, 19, 8, -20, -8, 28, 16, -24, -26, 9, -14, -2, -25, -15, -27, -14, -26, -6, -27, 27, 3, 16, 8, -1, 17, 12, 24, -15, 22, -7, -27, -13, 20, -26, -30, 24, 15, 27, 30, -28, -5, 24, 12, -24, 17, 9, -7], 3) == 17
end