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2025 day 05 p2

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mnerv
2025-12-14 20:43:34 +01:00
parent ed04586b1d
commit 8062f9a537
2 changed files with 193 additions and 18 deletions
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99
2025/day05.cpp
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@@ -5,6 +5,7 @@
#include <string_view>
#include <utility>
#include <vector>
#include <set>
#include "fmt/std.h"
@@ -34,11 +35,6 @@ static auto entry([[maybe_unused]]std::span<char const*> const& args) -> void {
auto str = aoc::read_text("./input.txt").value_or("");
str = aoc::trim(str);
fmt::print("INPUT\n");
fmt::print("⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼⎽⎼⎻⎺⎻⎼\n");
fmt::print("{}\n", str);
fmt::print("{}\n", std::string(80, '-'));
auto id_spec = str | std::views::split("\r\n\r\n"sv) | std::views::transform([](auto const& str) {
return aoc::trim({std::begin(str), std::end(str)});
}) | std::ranges::to<std::vector>();
@@ -56,27 +52,94 @@ static auto entry([[maybe_unused]]std::span<char const*> const& args) -> void {
return std::stod(std::string{std::begin(str), std::end(str)});
}) | std::ranges::to<std::vector>();
f64 sum = 0;
struct range {
f64 start;
f64 end;
};
for (usize i = 0; i < ids.size(); ++i) {
auto const id = ids[i];
bool is_valid = false;
for (usize j = 0; j < id_range.size(); ++j) {
auto const a = id_range[j][0];
auto const b = id_range[j][1];
// f64 sum = 0;
if (id >= a && id <= b) {
is_valid = true;
break;
}
// for (usize i = 0; i < ids.size(); ++i) {
// auto const id = ids[i];
// bool is_valid = false;
// for (usize j = 0; j < id_range.size(); ++j) {
// auto const a = id_range[j][0];
// auto const b = id_range[j][1];
//
// if (id >= a && id <= b) {
// is_valid = true;
// break;
// }
// }
//
// fmt::print("id: {} is {}\n", id, is_valid ? "valid" : "not valid");
//
// if (is_valid) ++sum;
// }
std::vector<range> range_vec{};
for (usize i = 0; i < id_range.size(); ++i) {
auto const a = id_range[i][0];
auto const b = id_range[i][1];
range_vec.push_back({a, b});
}
fmt::print("id: {} is {}\n", id, is_valid ? "valid" : "not valid");
std::ranges::sort(range_vec, [](auto a, auto b) {
return a.start < b.start;
});
fmt::print("----------\n");
if (is_valid) ++sum;
// for (auto const& r : range_vec) {
// fmt::print("{}-{}\n", r.start, r.end);
// }
//
// fmt::print("----------\n");
std::vector<range> ranges{};
for (usize i = 0; i < range_vec.size(); i += 1) {
auto const& r = range_vec[i];
if (ranges.empty()) {
ranges.push_back(r);
continue;
}
if (ranges.back().start <= r.start && ranges.back().end >= r.end) {
continue;
}
if (ranges.back().end >= r.start) {
ranges.back().end = r.end;
continue;
}
ranges.push_back(r);
}
fmt::print("\n");
f64 sum = 0.0;
for (auto const& r : ranges) {
// fmt::print("{}-{} ", r.start, r.end);
auto const d = (r.end - r.start) + 1;
fmt::print("{}\n", d);
sum += d;
}
fmt::print("res: {}\n", sum);
//
// std::vector<f64> ranges{};
// for (auto const& value : set) ranges.push_back(value);
// set = {};
// std::ranges::sort(ranges);
//
//
// // for (auto const& id : valid_ids) {
// // fmt::print("{} ", id);
// // }
// fmt::print("\n");
//
// fmt::print("res: {}\n", sum);
}
auto main([[maybe_unused]]int argc, [[maybe_unused]]char const* argv[]) -> int {

112
2025/day08.cpp Normal file
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@@ -0,0 +1,112 @@
#include <span>
#include <algorithm>
#include <ranges>
#include <string>
#include <string_view>
#include <utility>
#include <vector>
#include <tuple>
#include "fmt/std.h"
#include "aoc/types.hpp"
#include "aoc/utils.hpp"
using namespace std::string_view_literals;
using namespace aoc::types;
// starts at 50
[[maybe_unused]]constexpr auto raw_str = R"(
162,817,812
57,618,57
906,360,560
592,479,940
352,342,300
466,668,158
542,29,236
431,825,988
739,650,466
52,470,668
216,146,977
819,987,18
117,168,530
805,96,715
346,949,466
970,615,88
941,993,340
862,61,35
984,92,344
425,690,689
)";
static auto entry([[maybe_unused]]std::span<char const*> const& args) -> void {
// std::string str{raw_str};
auto str = aoc::read_text("./input.txt").value_or("");
str = aoc::trim(str);
auto mat = str | std::views::split("\n"sv) | std::views::transform([](auto line) {
return line | std::views::split(""sv)
| std::views::transform([](auto tok) {
return std::string{std::begin(tok), std::end(tok)};
})
| std::ranges::to<std::vector>();
}) | std::ranges::to<std::vector>();
struct beam {
usize row;
usize col;
};
std::vector<beam> beams{};
for (usize i = 0; i < mat.size(); ++i) {
for (usize j = 0; j < mat[i].size(); ++j) {
if (mat[i][j] == "S") {
beams.push_back({i, j});
break;
}
auto const size = beams.size();
for (usize k = 0; k < size; ++k) {
if (beams[k].row == i - 1 && beams[k].col == j) {
if (mat[i][j] == ".") {
mat[i][j] = "|";
beams[k] = {i, j};
} else if (mat[i][j] == "^") {
beams[k] = {i, j - 1};
beams.push_back({i, j + 1});
mat[i][j - 1] = "|";
mat[i][j + 1] = "|";
}
}
}
}
}
f64 sum = 0.0;
for (usize i = 0; i < mat.size(); ++i) {
for (usize j = 0; j < mat[i].size(); ++j) {
if (mat[i][j] == "^") {
if (mat[i - 1][j] == "|") sum += 1;
}
}
}
fmt::print("res: {}\n", sum);
// for (auto const& row : mat) {
// for (auto const& col : row) {
// fmt::print("{}", col);
// }
// fmt::print("\n");
// }
}
auto main([[maybe_unused]]int argc, [[maybe_unused]]char const* argv[]) -> int {
try {
entry({argv, std::next(argv, argc)});
} catch (std::exception const& e) {
fmt::print(stderr, "{}\n", e.what());
return 1;
}
return 0;
}