84 lines
2.6 KiB
C++
84 lines
2.6 KiB
C++
#include <span>
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#include <algorithm>
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#include <ranges>
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#include <string>
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#include <string_view>
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#include <utility>
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#include <vector>
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#include "fmt/std.h"
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#include "aoc/types.hpp"
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#include "aoc/utils.hpp"
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using namespace std::string_view_literals;
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using namespace aoc::types;
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// starts at 50
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[[maybe_unused]]constexpr auto raw_str = R"(
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..@@.@@@@.
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@@@.@.@.@@
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@@@@@.@.@@
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@.@@@@..@.
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@@.@@@@.@@
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.@@@@@@@.@
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.@.@.@.@@@
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@.@@@.@@@@
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.@@@@@@@@.
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@.@.@@@.@.
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)";
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static auto entry([[maybe_unused]]std::span<char const*> const& args) -> void {
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// std::string str{raw_str};
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auto str = aoc::read_text("./input.txt").value_or("");
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str = aoc::trim(str);
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fmt::print("INPUT\n");
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fmt::print("⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼\n");
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fmt::print("{}\n", str);
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fmt::print("{}\n", std::string(80, '-'));
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auto grid = str | std::views::split("\n"sv) | std::views::transform([](auto const& str) {
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return aoc::trim(std::string{std::begin(str), std::end(str)}) |
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std::views::transform([](auto const& ch) { return ch; }) |
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std::ranges::to<std::vector>();
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}) | std::ranges::to<std::vector>();
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u64 access = 0;
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for (isize i = 0; i < isize(grid.size()); ++i) {
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for (isize j = 0; j < isize(grid[i].size()); ++j) {
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auto const v = grid[i][j];
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if (v == '.') continue;
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u64 sum = 0;
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if (i - 1 >= 0 && j - 1 >= 0 && grid[i - 1][j - 1] == '@') ++sum;
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if (i - 1 >= 0 && grid[i - 1][j] == '@') ++sum;
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if (i - 1 >= 0 && j + 1 < isize(grid[i].size()) && grid[i - 1][j + 1] == '@') ++sum;
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if (j - 1 >= 0 && grid[i][j - 1] == '@') ++sum;
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if (j + 1 < isize(grid[i].size()) && grid[i][j + 1] == '@') ++sum;
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if (i + 1 < isize(grid.size()) && j - 1 >= 0 && grid[i + 1][j - 1] == '@') ++sum;
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if (i + 1 < isize(grid.size()) && grid[i + 1][j] == '@') ++sum;
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if (i + 1 < isize(grid.size()) && j + 1 < isize(grid[i].size()) && grid[i + 1][j + 1] == '@') ++sum;
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if (sum < 4) {
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// fmt::print("{},{}: {}\n", i, j, sum);
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++access;
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}
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}
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}
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fmt::print("res: {}\n", access);
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}
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auto main([[maybe_unused]]int argc, [[maybe_unused]]char const* argv[]) -> int {
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try {
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entry({argv, std::next(argv, argc)});
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} catch (std::exception const& e) {
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fmt::print(stderr, "{}\n", e.what());
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return 1;
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}
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return 0;
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}
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