mirror of
https://github.com/MorizzG/aoc-2024.git
synced 2025-12-06 04:22:43 +00:00
day 11 done
This commit is contained in:
parent
e0ceda6bb0
commit
d06f8527ff
13 changed files with 211 additions and 34 deletions
8
day1.zig
8
day1.zig
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@ -2,7 +2,9 @@ const std = @import("std");
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const utils = @import("lib/utils.zig");
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const filename = "inputs/day1.txt";
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const day = "1";
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const filename = "inputs/day" ++ day ++ ".txt";
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pub fn main() !void {
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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@ -14,7 +16,7 @@ pub fn main() !void {
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const result = try part1(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day 1, part 1: {}\n", .{result});
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 1: {}\n", .{result});
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}
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{
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@ -23,7 +25,7 @@ pub fn main() !void {
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const result = try part2(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day 1, part 1: {}\n", .{result});
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 2: {}\n", .{result});
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}
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}
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@ -4,7 +4,9 @@ const utils = @import("lib/utils.zig");
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const spice = @import("lib/spice.zig");
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const filename = "inputs/day10.txt";
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const day = "10";
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const filename = "inputs/day" ++ day ++ ".txt";
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pub fn main() !void {
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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@ -16,7 +18,7 @@ pub fn main() !void {
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const result = try part1(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day 10, part 1: {}\n", .{result});
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 1: {}\n", .{result});
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}
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{
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@ -25,7 +27,7 @@ pub fn main() !void {
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const result = try part2(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day 10, part 2: {}\n", .{result});
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 2: {}\n", .{result});
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}
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}
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154
day11.zig
Normal file
154
day11.zig
Normal file
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@ -0,0 +1,154 @@
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const std = @import("std");
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const utils = @import("lib/utils.zig");
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const spice = @import("lib/spice.zig");
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const day = "11";
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const filename = "inputs/day" ++ day ++ ".txt";
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pub fn main() !void {
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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const alloc = gpa.allocator();
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{
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const file_reader = try utils.FileReader.init(alloc, filename);
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defer file_reader.deinit();
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const result = try part1(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 1: {}\n", .{result});
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}
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{
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const file_reader = try utils.FileReader.init(alloc, filename);
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defer file_reader.deinit();
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const result = try part2(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 2: {}\n", .{result});
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}
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}
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const CacheKey = struct { n: u64, depth: u8 };
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fn countStones(n: u64, remaining_depth: u8, cache: *std.AutoHashMap(CacheKey, u64)) u64 {
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if (remaining_depth == 0) {
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return 1;
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}
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if (cache.get(.{ .n = n, .depth = remaining_depth })) |result| {
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return result;
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}
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if (n == 0) {
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const result = countStones(1, remaining_depth - 1, cache);
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cache.put(.{ .n = n, .depth = remaining_depth }, result) catch @panic("cache put failed");
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return result;
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// try countStones(count, 1, remaining_depth);
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// return;
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}
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if (utils.num_digits(n) % 2 == 0) {
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const num_digits = utils.num_digits(n);
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const pow10 = std.math.powi(u32, 10, num_digits / 2) catch @panic("powi failed");
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const left = n / pow10;
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const right = n % pow10;
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// return countStones(left, remaining_depth - 1, cache) + countStones(right, remaining_depth - 1, cache);
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const left_result = countStones(left, remaining_depth - 1, cache);
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const right_result = countStones(right, remaining_depth - 1, cache);
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const result = left_result + right_result;
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cache.put(.{ .n = n, .depth = remaining_depth }, result) catch @panic("cache put failed");
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return left_result + right_result;
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// try countStones(count, left, remaining_depth - 1);
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// try countStones(count, right, remaining_depth - 1);
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// return;
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}
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const result = countStones(n * 2024, remaining_depth - 1, cache);
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cache.put(.{ .n = n, .depth = remaining_depth }, result) catch @panic("cache put failed");
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return result;
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// try countStones(count, 2024 * n, remaining_depth - 1);
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}
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fn part1(alloc: std.mem.Allocator, reader: anytype) !u64 {
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const input = try reader.readAllAlloc(alloc, std.math.maxInt(usize));
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defer alloc.free(input);
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var count: u64 = 0;
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var cache = std.AutoHashMap(CacheKey, u64).init(alloc);
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defer cache.deinit();
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var number_parser = utils.numberParser(u64, input);
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while (try number_parser.next()) |n| {
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count += countStones(n, 25, &cache);
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}
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return count;
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}
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fn part2(alloc: std.mem.Allocator, reader: anytype) !u64 {
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const input = try reader.readAllAlloc(alloc, std.math.maxInt(usize));
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defer alloc.free(input);
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var count: u64 = 0;
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var cache = std.AutoHashMap(CacheKey, u64).init(alloc);
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defer cache.deinit();
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var number_parser = utils.numberParser(u64, input);
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while (try number_parser.next()) |n| {
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count += countStones(n, 75, &cache);
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}
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return count;
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}
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test "part1 example" {
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const alloc = std.testing.allocator;
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const example = "125 17";
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var stream = std.io.fixedBufferStream(example);
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const result = try part1(alloc, stream.reader());
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try std.testing.expectEqual(55312, result);
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}
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test "part1 input" {
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const alloc = std.testing.allocator;
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const file_reader = try utils.FileReader.init(alloc, filename);
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defer file_reader.deinit();
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const result = try part1(alloc, file_reader.reader());
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try std.testing.expectEqual(193899, result);
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}
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test "part2 input" {
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const alloc = std.testing.allocator;
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const file_reader = try utils.FileReader.init(alloc, filename);
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defer file_reader.deinit();
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const result = try part2(alloc, file_reader.reader());
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try std.testing.expectEqual(229682160383225, result);
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}
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8
day2.zig
8
day2.zig
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@ -2,7 +2,9 @@ const std = @import("std");
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const utils = @import("lib/utils.zig");
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const filename = "inputs/day2.txt";
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const day = "2";
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const filename = "inputs/day" ++ day ++ ".txt";
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pub fn main() !void {
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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@ -14,7 +16,7 @@ pub fn main() !void {
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const result = try part1(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day 2, part 1: {}\n", .{result});
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 1: {}\n", .{result});
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}
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{
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@ -23,7 +25,7 @@ pub fn main() !void {
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const result = try part2(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day 2, part 2: {}\n", .{result});
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 2: {}\n", .{result});
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}
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}
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8
day3.zig
8
day3.zig
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@ -4,7 +4,9 @@ const utils = @import("lib/utils.zig");
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const isDigit = std.ascii.isDigit;
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const filename = "inputs/day3.txt";
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const day = "3";
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const filename = "inputs/day" ++ day ++ ".txt";
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pub fn main() !void {
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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@ -16,7 +18,7 @@ pub fn main() !void {
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const result = try part1(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day 3, part 1: {}\n", .{result});
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 1: {}\n", .{result});
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}
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{
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@ -25,7 +27,7 @@ pub fn main() !void {
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const result = try part2(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day 3, part 2: {}\n", .{result});
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 2: {}\n", .{result});
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}
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}
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8
day4.zig
8
day4.zig
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@ -2,7 +2,9 @@ const std = @import("std");
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const utils = @import("lib/utils.zig");
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const filename = "inputs/day4.txt";
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const day = "4";
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const filename = "inputs/day" ++ day ++ ".txt";
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pub fn main() !void {
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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@ -14,7 +16,7 @@ pub fn main() !void {
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const result = try part1(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day 4, part 1: {}\n", .{result});
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 1: {}\n", .{result});
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}
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{
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@ -23,7 +25,7 @@ pub fn main() !void {
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const result = try part2(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day 4, part 2: {}\n", .{result});
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 2: {}\n", .{result});
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}
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}
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8
day5.zig
8
day5.zig
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@ -4,7 +4,9 @@ const utils = @import("lib/utils.zig");
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const List = std.DoublyLinkedList(u8);
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const filename = "inputs/day5.txt";
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const day = "5";
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const filename = "inputs/day" ++ day ++ ".txt";
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pub fn main() !void {
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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@ -16,7 +18,7 @@ pub fn main() !void {
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const result = try part1(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day 5, part 1: {}\n", .{result});
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 1: {}\n", .{result});
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}
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{
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@ -25,7 +27,7 @@ pub fn main() !void {
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const result = try part2(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day 5, part 2: {}\n", .{result});
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 2: {}\n", .{result});
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}
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}
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8
day6.zig
8
day6.zig
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@ -2,7 +2,9 @@ const std = @import("std");
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const utils = @import("lib/utils.zig");
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const filename = "inputs/day6.txt";
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const day = "6";
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const filename = "inputs/day" ++ day ++ ".txt";
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pub fn main() !void {
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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@ -14,7 +16,7 @@ pub fn main() !void {
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const result = try part1(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day 6, part 1: {}\n", .{result});
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 1: {}\n", .{result});
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}
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{
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@ -23,7 +25,7 @@ pub fn main() !void {
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const result = try part2(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day 6, part 2: {}\n", .{result});
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 2: {}\n", .{result});
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}
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}
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8
day7.zig
8
day7.zig
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@ -4,7 +4,9 @@ const utils = @import("lib/utils.zig");
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const spice = @import("lib/spice.zig");
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const filename = "inputs/day7.txt";
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const day = "7";
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const filename = "inputs/day" ++ day ++ ".txt";
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pub fn main() !void {
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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@ -16,7 +18,7 @@ pub fn main() !void {
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const result = try part1(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day 7, part 1: {}\n", .{result});
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 1: {}\n", .{result});
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}
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{
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@ -25,7 +27,7 @@ pub fn main() !void {
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const result = try part2(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day 7, part 2: {}\n", .{result});
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 2: {}\n", .{result});
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}
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}
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8
day8.zig
8
day8.zig
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@ -4,7 +4,9 @@ const utils = @import("lib/utils.zig");
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const spice = @import("lib/spice.zig");
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const filename = "inputs/day8.txt";
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const day = "8";
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const filename = "inputs/day" ++ day ++ ".txt";
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pub fn main() !void {
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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@ -16,7 +18,7 @@ pub fn main() !void {
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const result = try part1(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day 8, part 1: {}\n", .{result});
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 1: {}\n", .{result});
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}
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{
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@ -25,7 +27,7 @@ pub fn main() !void {
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const result = try part2(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day 8, part 2: {}\n", .{result});
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 2: {}\n", .{result});
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}
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}
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8
day9.zig
8
day9.zig
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@ -4,7 +4,9 @@ const utils = @import("lib/utils.zig");
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const spice = @import("lib/spice.zig");
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const filename = "inputs/day9.txt";
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const day = "9";
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const filename = "inputs/day" ++ day ++ ".txt";
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pub fn main() !void {
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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@ -16,7 +18,7 @@ pub fn main() !void {
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const result = try part1(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day 9, part 1: {}\n", .{result});
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 1: {}\n", .{result});
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}
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{
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@ -25,7 +27,7 @@ pub fn main() !void {
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const result = try part2(alloc, file_reader.reader());
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try std.io.getStdOut().writer().print("Day 9, part 2: {}\n", .{result});
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try std.io.getStdOut().writer().print("Day " ++ day ++ ", part 2: {}\n", .{result});
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}
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}
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|
|||
1
inputs/day11.txt
Normal file
1
inputs/day11.txt
Normal file
|
|
@ -0,0 +1 @@
|
|||
0 89741 316108 7641 756 9 7832357 91
|
||||
|
|
@ -92,12 +92,14 @@ pub fn NumberParser(comptime T: type) type {
|
|||
};
|
||||
}
|
||||
|
||||
pub fn numberParser(comptime T: type, input: []const u8) NumberParser(T) {
|
||||
return NumberParser(T){ .token_it = std.mem.tokenizeScalar(u8, input, ' ') };
|
||||
pub fn numberParserWithDelimiter(comptime T: type, input: []const u8, delimiter: u8) NumberParser(T) {
|
||||
const input_trimmed = std.mem.trim(u8, input, "\n");
|
||||
|
||||
return NumberParser(T){ .token_it = std.mem.tokenizeScalar(u8, input_trimmed, delimiter) };
|
||||
}
|
||||
|
||||
pub fn numberParserWithDelimiter(comptime T: type, input: []const u8, delimiter: u8) NumberParser(T) {
|
||||
return NumberParser(T){ .token_it = std.mem.tokenizeScalar(u8, input, delimiter) };
|
||||
pub fn numberParser(comptime T: type, input: []const u8) NumberParser(T) {
|
||||
return numberParserWithDelimiter(T, input, ' ');
|
||||
}
|
||||
|
||||
pub fn allocGrid(comptime T: type, alloc: std.mem.Allocator, n: usize, m: usize) ![][]T {
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue