NonoSolver
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Another small changes

diff -r bb387d75e419 -r c8b492b56d3d cell.cpp

--- a/cell.cpp Mon Feb 15 22:09:55 2021 +0300

+++ b/cell.cpp Mon Feb 15 22:25:36 2021 +0300

		@@ -27,7 +27,7 @@
27	27	{
28	28	// TODO: replace it to actual exception
29	29	if (max_colors > MAX_COLORS) throw 42;
30		- m_data = 1u >> (max_colors + 1) - 1u;
	30	+ m_data = (1u << (max_colors + 1)) - 1u;
31	31	}
32	32
33	33	std::optional<int> Cell::get_color() const

		@@ -39,7 +39,7 @@
39	39
40	40	bool Cell::is_color_possible(int color_number) const
41	41	{
42		- return m_data & (1u << color_number) != 0;
	42	+ return (m_data & (1u << color_number)) != 0;
43	43	}
44	44
45	45	bool Cell::is_impossible() const

diff -r bb387d75e419 -r c8b492b56d3d row_solver.cpp

--- a/row_solver.cpp Mon Feb 15 22:09:55 2021 +0300

+++ b/row_solver.cpp Mon Feb 15 22:25:36 2021 +0300

		@@ -4,7 +4,8 @@
4	4	std::vector<int> adjust(std::vector<Cell> &cells, std::vector<std::pair<int, int>> &block_list)
5	5	{
6	6	const size_t n = cells.size();
7		- if (n == 0) return {};
	7	+ std::vector<int> res;
	8	+ if (n == 0) return res;
8	9
9	10	const int max_colors = cells[0].max_colors();
10	11	const size_t k = block_list.size();