adrien/Advent-of-Code
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adrien
2024-12-05 00:17:39 +01:00
parent 60634c1b25
commit 42e86ecf5d
11 changed files with 2742 additions and 3 deletions
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day4/part1.zig
+156
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@@ -0,0 +1,156 @@
const std = @import("std");
const print = std.debug.print;
var file_buf: [140 * 141]u8 = undefined;
var matrice: [143][143]u8 = undefined;
const masks = [_][4][4]u8{
[4][4]u8{
[4]u8{ ' ', ' ', ' ', ' ' },
[4]u8{ 'X', 'M', 'A', 'S' },
[4]u8{ ' ', ' ', ' ', ' ' },
[4]u8{ ' ', ' ', ' ', ' ' },
},
[4][4]u8{
[4]u8{ ' ', ' ', ' ', ' ' },
[4]u8{ 'S', 'A', 'M', 'X' },
[4]u8{ ' ', ' ', ' ', ' ' },
[4]u8{ ' ', ' ', ' ', ' ' },
},
[4][4]u8{
[4]u8{ ' ', 'X', ' ', ' ' },
[4]u8{ ' ', 'M', ' ', ' ' },
[4]u8{ ' ', 'A', ' ', ' ' },
[4]u8{ ' ', 'S', ' ', ' ' },
},
[4][4]u8{
[4]u8{ ' ', 'S', ' ', ' ' },
[4]u8{ ' ', 'A', ' ', ' ' },
[4]u8{ ' ', 'M', ' ', ' ' },
[4]u8{ ' ', 'X', ' ', ' ' },
},
[4][4]u8{
[4]u8{ 'X', ' ', ' ', ' ' },
[4]u8{ ' ', 'M', ' ', ' ' },
[4]u8{ ' ', ' ', 'A', ' ' },
[4]u8{ ' ', ' ', ' ', 'S' },
},
[4][4]u8{
[4]u8{ 'S', ' ', ' ', ' ' },
[4]u8{ ' ', 'A', ' ', ' ' },
[4]u8{ ' ', ' ', 'M', ' ' },
[4]u8{ ' ', ' ', ' ', 'X' },
},
[4][4]u8{
[4]u8{ ' ', ' ', ' ', 'X' },
[4]u8{ ' ', ' ', 'M', ' ' },
[4]u8{ ' ', 'A', ' ', ' ' },
[4]u8{ 'S', ' ', ' ', ' ' },
},
[4][4]u8{
[4]u8{ ' ', ' ', ' ', 'S' },
[4]u8{ ' ', ' ', 'A', ' ' },
[4]u8{ ' ', 'M', ' ', ' ' },
[4]u8{ 'X', ' ', ' ', ' ' },
},
};
pub fn main() !void {
const time_start = std.time.microTimestamp();
setMatrice('.');
try fillMatrice();
const total = countMask();
const time_end = std.time.microTimestamp();
print("Total time: {d}μs\n", .{time_end - time_start});
print("Total: {d}\n", .{total});
}
fn evaluate(mask: [4][4]u8, sub: [4][4]u8) bool {
var count: u3 = 0;
for (mask, sub) |maskX, subX| {
for (maskX, subX) |maskY, subY| {
count += if (maskY == subY) 1 else 0;
}
}
return count == 4;
}
fn setMatrice(c: u8) void {
for (0..143) |x| {
for (0..143) |y| {
matrice[x][y] = c;
}
}
}
fn fillMatrice() !void {
const file = try std.fs.cwd().openFile("day4/input", .{});
defer file.close();
_ = try file.readAll(&file_buf);
var iter = std.mem.split(u8, &file_buf, "\n");
var x: usize = 1;
while (iter.next()) |line| {
defer x += 1;
for (line, 1..) |c, y| {
matrice[x][y] = c;
}
}
}
fn countMask() u32 {
var total: u32 = 0;
var iter = MatriceIterator.init();
while (iter.next()) |sub| {
for (masks) |mask| {
total += if (evaluate(mask, sub)) 1 else 0;
}
}
return total;
}
const MatriceIterator = struct {
x: u32 = 0,
y: u32 = 0,
return_buf: [4][4]u8 = undefined,
fn init() MatriceIterator {
return MatriceIterator{};
}
fn next(self: *MatriceIterator) ?[4][4]u8 {
if (self.x == 139 and self.y == 139) return null;
self.y += 1;
if (self.y == 140) {
self.x += 1;
self.y = 0;
}
for (self.x..(self.x + 4), 0..) |x, a| {
for (self.y..(self.y + 4), 0..) |y, b| {
self.return_buf[a][b] = matrice[x][y];
}
}
return self.return_buf;
}
};
test "evaluate" {
const toEval = [4][4]u8{
[4]u8{ '.', '.', '.', '.' },
[4]u8{ 'X', 'M', 'A', 'S' },
[4]u8{ '.', '.', '.', '.' },
[4]u8{ '.', '.', '.', '.' },
};
try std.testing.expect(evaluate(masks[0], toEval));
}
day4/part2.zig
+118
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@@ -0,0 +1,118 @@
const std = @import("std");
const print = std.debug.print;
var file_buf: [140 * 141]u8 = undefined;
var matrice: [142][142]u8 = undefined;
const masks = [_][3][3]u8{
[3][3]u8{
[3]u8{ 'M', ' ', 'S' },
[3]u8{ ' ', 'A', ' ' },
[3]u8{ 'M', ' ', 'S' },
},
[3][3]u8{
[3]u8{ 'M', ' ', 'M' },
[3]u8{ ' ', 'A', ' ' },
[3]u8{ 'S', ' ', 'S' },
},
[3][3]u8{
[3]u8{ 'S', ' ', 'S' },
[3]u8{ ' ', 'A', ' ' },
[3]u8{ 'M', ' ', 'M' },
},
[3][3]u8{
[3]u8{ 'S', ' ', 'M' },
[3]u8{ ' ', 'A', ' ' },
[3]u8{ 'S', ' ', 'M' },
},
};
pub fn main() !void {
const time_start = std.time.microTimestamp();
setMatrice('.');
try fillMatrice();
const total = countMask();
const time_end = std.time.microTimestamp();
print("Total time: {d}μs\n", .{time_end - time_start});
print("Total: {d}\n", .{total});
}
fn evaluate(mask: [3][3]u8, sub: [3][3]u8) bool {
var count: u4 = 0;
for (mask, sub) |maskX, subX| {
for (maskX, subX) |maskY, subY| {
count += if (maskY == subY) 1 else 0;
}
}
return count == 5;
}
fn setMatrice(c: u8) void {
for (0..142) |x| {
for (0..142) |y| {
matrice[x][y] = c;
}
}
}
fn fillMatrice() !void {
const file = try std.fs.cwd().openFile("day4/input", .{});
defer file.close();
_ = try file.readAll(&file_buf);
var iter = std.mem.split(u8, &file_buf, "\n");
var x: usize = 1;
while (iter.next()) |line| {
defer x += 1;
for (line, 1..) |c, y| {
matrice[x][y] = c;
}
}
}
fn countMask() u32 {
var total: u32 = 0;
var iter = MatriceIterator.init();
while (iter.next()) |sub| {
for (masks) |mask| {
total += if (evaluate(mask, sub)) 1 else 0;
}
}
return total;
}
const MatriceIterator = struct {
x: u32 = 0,
y: u32 = 0,
return_buf: [3][3]u8 = undefined,
fn init() MatriceIterator {
return MatriceIterator{};
}
fn next(self: *MatriceIterator) ?[3][3]u8 {
if (self.x == 139 and self.y == 139) return null;
self.y += 1;
if (self.y == 140) {
self.x += 1;
self.y = 0;
}
for (self.x..(self.x + 3), 0..) |x, a| {
for (self.y..(self.y + 3), 0..) |y, b| {
self.return_buf[a][b] = matrice[x][y];
}
}
return self.return_buf;
}
};