Add solution for 2023 day 03
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| Day | Part 1 | Part 2 | Language |
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| :--: | :----: | :----: | :------- |
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| [01] | ✓ | ✓ | [Zig] |
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| [02] | ✓ | ✓ | |
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| [03] | | | |
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| [02] | ✓ | ✓ | [Zig] |
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| [03] | ✓ | ✓ | [Zig] |
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| [04] | | | |
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| [05] | | | |
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| [06] | | | |
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158
2023/day-03/common.zig
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158
2023/day-03/common.zig
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@ -0,0 +1,158 @@
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const std = @import("std");
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const alloc = std.heap.page_allocator;
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const List = std.ArrayList;
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const HashMap = std.AutoHashMap;
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const SymbolMap = HashMap(usize, HashMap(usize, u8));
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pub const Symbol = struct {
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val: u8,
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row: usize,
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col: usize,
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};
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pub const Number = struct {
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val: u32,
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row: usize,
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col: usize,
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len: usize,
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pub fn has_adjacent_symbols(self: *const Number, schematic: *const Schematic) !bool {
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const adjacent = try self.adjacent_symbols(schematic);
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defer adjacent.deinit();
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return adjacent.items.len != 0;
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}
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pub fn adjacent_symbols(self: *const Number, schematic: *const Schematic) !List(Symbol) {
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const symbols = schematic.symbols;
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const height = schematic.height;
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var adjacent = List(Symbol).init(alloc);
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const num_start = self.col;
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const num_end = self.col + self.len;
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for (num_start..num_end) |num_pos| {
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if (num_pos > 0 and num_pos == num_start) {
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const start = if (self.row == 0) self.row else self.row - 1;
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const end = if (self.row == height - 1) self.row + 1 else self.row + 2;
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for (start..end) |row| {
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if (symbols.get(row)) |sym_row| {
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if (sym_row.get(num_pos - 1)) |sym| {
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try adjacent.append(.{ .val = sym, .row = row, .col = num_pos - 1 });
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}
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}
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}
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}
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if (self.row > 0) {
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if (symbols.get(self.row - 1)) |sym_row_above| {
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if (sym_row_above.get(num_pos)) |sym| {
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try adjacent.append(.{ .val = sym, .row = self.row - 1, .col = num_pos });
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}
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}
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}
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if (self.row < height - 1) {
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if (symbols.get(self.row + 1)) |sym_row_below| {
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if (sym_row_below.get(num_pos)) |sym| {
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try adjacent.append(.{ .val = sym, .row = self.row + 1, .col = num_pos });
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}
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}
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}
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if (num_pos == num_end - 1) {
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const start = if (self.row == 0) self.row else self.row - 1;
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const end = if (self.row == height - 1) self.row + 1 else self.row + 2;
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for (start..end) |row| {
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if (symbols.get(row)) |sym_row| {
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if (sym_row.get(num_pos + 1)) |sym| {
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try adjacent.append(.{ .val = sym, .row = row, .col = num_pos + 1 });
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}
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}
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}
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}
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}
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return adjacent;
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}
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};
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pub const Schematic = struct {
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numbers: List(List(Number)),
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symbols: SymbolMap,
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width: usize,
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height: usize,
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};
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pub fn parse(data: []const u8) !Schematic {
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var lines = std.mem.tokenizeSequence(u8, data, "\n");
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var numbers = List(List(Number)).init(alloc);
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var symbols = SymbolMap.init(alloc);
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var width: ?usize = null;
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var i: usize = 0;
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while (lines.next()) |line| {
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if (width == null) {
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width = line.len;
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}
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var symbols_row = HashMap(usize, u8).init(alloc);
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var numbers_row = List(Number).init(alloc);
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var num_buf = List(u8).init(alloc);
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var j: usize = 0;
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for (line) |byte| {
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if (std.ascii.isDigit(byte)) {
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try num_buf.append(byte);
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} else {
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if (try parse_number(&num_buf, i, j)) |num| {
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try numbers_row.append(num);
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}
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if (byte != '.') {
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try symbols_row.put(j, byte);
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}
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}
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j += 1;
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}
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if (try parse_number(&num_buf, i, j)) |num| {
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try numbers_row.append(num);
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}
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try numbers.append(numbers_row);
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try symbols.put(i, symbols_row);
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i += 1;
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}
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const schematic = .{
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.numbers = numbers,
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.symbols = symbols,
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.width = width.?,
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.height = i,
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};
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return schematic;
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}
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fn parse_number(buf: *List(u8), row: usize, col: usize) !?Number {
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const num_raw = try buf.toOwnedSlice();
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const len = num_raw.len;
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if (len > 0) {
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const val = try std.fmt.parseInt(u32, num_raw, 10);
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const num = .{
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.val = val,
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.row = row,
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.col = col - len,
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.len = len,
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};
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return num;
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}
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return null;
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}
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140
2023/day-03/inputs/puzzle.txt
Normal file
140
2023/day-03/inputs/puzzle.txt
Normal file
@ -0,0 +1,140 @@
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.........798...145.........629....579.....455.....................130.............243.................154........167........................
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............*.....*...........*...&...179.*........737...194.........*854........./...........52..560*............................699...&...
|
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........459..489.817........880.........*..996........*....*........................................................................*.36....
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...........@.........................813............234.552..307....184............370..................736.....960..............631........
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...100...................*...............131..................*........=......435..*......34...........*....................................
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......+....#126.......214..........$......*.....+.............939................/..729..............861.....243..........438...............
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...................................854....979....177.......%.........280..138................158*241............*..........*....*904...#....
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.......427............................................683&.726...303........*.......905.......................&..115.....412.479.....491....
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.....=.*...........989......888.....................$............../.226....922.172....*..702*693...........543.............................
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..924..219...........*.....*........979............191.%.........+..............*.....323....................................777............
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....................109........................559.....835.....708........989..685................................#.............=.915.......
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........................................*........=.........751........886................243.......154+..922...347................/.........
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......923...............571.....@.672....963.471.......154...*.........*.....................914...........*.............891.........73*212.
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.........*......654+....&....309...=.........*....543.........583....871.....*........................551...370...$......*...492............
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||||
..618*....60.........................426...&.645....*....................203..310....$...........@166...........477...@.......%......150*...
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......353......381..........416.....*....19......536......#..312..../790.*............779..$.........../............985..................761
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...........#............636..*....238...................576.....*........899................460.841..829.415...271*.......168.77....=.......
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..........427............$.......................................75..............789...942........-......*.........795......*.......73......
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....863................%.......920..........*152.....852*387.........990.....563..*.....*...629........772....912............283............
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837*.......897.......674...966....&.%621..77..................................&..571...272.........566.....16*.....936.....&......980.......
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..............*............*....-.........................*..............424#...................53.*......................203...............
|
||||
...826.781.....105......&...771.982............967......40.223.....................71............*..123.........-...@....................998
|
||||
...$................64.562.............../382....*.................866-....276.....*........750.975...........878..156..........188.........
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...........38+..............937...................142.........*712........$.....619..*734............424..................=.................
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....746...................@....+..868..-......881...........................+.........................*.......832.../....649...-.......181..
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...*.......+637...478....628......%.....651....................../.....399%..396.............&..293.472..........*.960..........988....*....
|
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....693..........$..................-.......711.99.489.878....541...........................565..#.........32..710......499............888..
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....................681.59.442.....368.%.........*.......&..........................974............*........%...............................
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677....924......797.......*............964......666.................89......309.......*.........324.179..........437.......235.321...678....
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............+..........$......5...............$......./......23..............$.........328..564.........392......*............*........*....
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...298......811.........976..*.................400...140....*.......893................................*....%.682.....345.............726...
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..............................570.839......................828.....*......-......59....373.......%...558..271...........*......*751.........
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.....570...........353*674........#....636........659..............647.....226..*.......+......684...............139...290..401........290..
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........&..................231...............80..........@112....................892......605...............247...+................$...*....
|
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165........*329..94*254..........115...............938.................192...............*......$58.............@......786.....328..59..285.
|
||||
.........98........................$.....895......*...............459..*...............399..641..................285...$..........*.........
|
||||
.............../..455*429............794*.....................512.*....770.....448...........@...................................336.175....
|
||||
......#......277................................763............*..254.....................*....143...495..$.......676...................#...
|
||||
.......272.........-..................711..911...*.....614..516............747.389.....803........%.....*.832.......*....905....576..#......
|
||||
625.................595......989...............291.....*................*.....*............$..201.............528.722....%.....*......896...
|
||||
....342............................................569..486.......@..278.184.........259..107................%.................749..........
|
||||
...#..................851.......16..436*910.......@..............338...........989...*..........+.367.867............=..918.................
|
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.................106..#.........@...........................@.....................-...99......38....%....*.18&....550..*..........250.......
|
||||
..................+.........................&732....53....258....850..................................306.............539....@..............
|
||||
658*869..............684*636....422.686............*...............*...955..............*......................../...........313.....$......
|
||||
.............604.............................954....357.........458..................168.310.......698............435......%......394.......
|
||||
.....109....*.........163...........962$.....@..........=..................876*........................230..125...........24..972.....641...
|
||||
......*...312..........#........................*914....740....466*............374.............+......%....*...........46....*.....60.......
|
||||
...422............804......$.@......%........589...................500..958.............21..301...........889............*..717.............
|
||||
..........474..=.....*...302.475.155.............665..800..46..............=...................................19......902........936...887.
|
||||
............*.754...831...............8@.@............................110.....554..........732...=913.........*.....$............*..........
|
||||
456......211.................562.........183........................@......+..*.....839...............@...500.739..962.....105...528..-.....
|
||||
...............794.882.......+.....@..........833............595....704.693......=...*..............81...*.............571*............727..
|
||||
......590.30......*.................872...@...................................773.....156......&346......807.813.285+.........380...........
|
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........$..*...........*621.....528.....835.....556.......*85...516-.......................28.........*......-..........791$.....%..........
|
||||
....................965.....507.*.............*....*...377.............957................@....835.707.409.....987*...........=.......729...
|
||||
.....503......471..........*....267..169....200.369..........499..#...*....................................161.....464.....794.....*...#....
|
||||
........$.......*..........808......*....&..........643.....*....39....354......159........117@...308....-...*.........144.........452......
|
||||
..........$......910...........195..952..320.........*......832.................*...296.............*..860..401.........%....157/...........
|
||||
.......438..721................@..............89..144..332........987.........979..*.....%.........824............709................710....
|
||||
...209.......-........../............=952..............*.............*292.........582.661.....$........815.............857....254....*......
|
||||
....&..218%..........100................................74....................*................692.-.......545...................*..........
|
||||
.............297..........101....276.756..............#....462......492*578..636......=............860..........................399.........
|
||||
........171..............=........#..*...............407...%.......................331..915..............................919................
|
||||
....454*...................*83......100..702..............................271...........@...........59....582.../........*...........+......
|
||||
..............185*......687...........................186............739-...=......*.................+....*.....380..539..192.80......455...
|
||||
.......174........686.........562...958......192.......*..117...108.............567.298.................545...........*...........$.........
|
||||
.....$.....887........131..........-....955...*.....504...........%.243..281........................877.............610......216..130...-...
|
||||
.....646....*......76....................%..50.......................*.......541.......782.....752+....*......296*.......523...@......881...
|
||||
............802....*........976.................223*478........96...785.142.*......530....*721.........577........317.......*.....295.......
|
||||
....412.114........561...#....+............................52....*......*....999......*./....................................221.....*40....
|
||||
......*./......*.........435..........168..779....-..........*.272.....372.........652...489........*988.......810..........................
|
||||
80.110.......137....938...........924....#.+...896........305....................................885...........................831..........
|
||||
........&...............792.........................................773*100.958..&78.....*..............902....286................+.........
|
||||
........873..............&...........585..................127*899..............*.......60.982...........$......@....268..370.............567
|
||||
............781...*...........*174...*...............................26........203.652................................*............538......
|
||||
.............$.....534.....848......170......418........494/....298...*....792......./.......%......+687..............179............@.160..
|
||||
..474...711....................417.................................@.458....$..........*338..719............509..488......781.982...........
|
||||
.....*..........235.................622............$...804+..............*......577.870.............&..43.....&..-.............*.....278....
|
||||
....696.222.604.*.......*29...........$.....&....755...........55.....631.202.....................443....*....................692...*.......
|
||||
...........*....55...456.....782..422.......133......844........*..........................286-...........865.89..27...718........317.......
|
||||
.......611.....................-...*..995........712..*..........89...............@166..............771............*.....*..............589.
|
||||
...........417.....150..678...........*.............$.417..298.............611&..........811.327......*..$...610%.614.....443......-...*....
|
||||
.......658*..........-...*.......622..940.............................&....................*../..773.194.479..........996.........263..872..
|
||||
....90......%550.587......215.......*.......322.....229......841*....996...........826....305......@.........#405.....$.....................
|
||||
......*...........*..................671....*......*.............695.......694....+..............................................223.462.826
|
||||
..419.832.......271...828................228.................380........21*..........644............725....703......255..330........*.......
|
||||
.....................*.............................357.................................*........360...+.....#..%173...*..../../.............
|
||||
..................182...........88.664*......865..*................................428.................................143...829.552.....829
|
||||
...&..................425..894...*.....792...*.....321..219................=...564....*..166....%....+.....764...................*......=...
|
||||
..619.....529..384.....*......*...693.........188......-............281.238......=.339....*...124...278.....+....490.....481....416.........
|
||||
.................*.442..76....801.....376.................+511.......*......*.............967.......................*.68*............919....
|
||||
...731..484....875..#....................*243...681.................135..191.162.688%.........29.....*............688..........437......*...
|
||||
.....%.=........................329*87.............*138.-949..186.................................595.554...............755....*.....454....
|
||||
............341..302.........&...........330.....................@.......................779..............353......@.......*..535...........
|
||||
.....766.....*..*..........315......856.*................540..............136............*.......914..162*.......7..336..383............642.
|
||||
......../..253...502................*...990.....299.......+...413............*..........338.......%.............................294*........
|
||||
.....&..................636.986.431.345...............693.......*.......*...............................276..........836@.278.......716..469
|
||||
.....247........*.905*....$..*...*.......................$.....502...177.........72=......$...232......*................................*...
|
||||
.........674.905......664...124............*127.............................564........924.....*.....&.616...661..403....10.........429.724.
|
||||
........../..............................78..............#5..................*................498..650..........*.......*............*......
|
||||
.....348....*.........488...........414..........................962...552...107...@...533......................109....432....*......423....
|
||||
....*.......536................283....&......800.............&.......+..../........677.$..................32...............410.392..........
|
||||
....826.............755........*........396..*......../.......771.....837........=.............577.................53...............314.....
|
||||
.........@....109$...*..........988........$..241..750.............@............169...162......*...%....575.743......*..................278.
|
||||
..........862........227....585........158.............262.....51..151..................*..509...31............*..........+....144.481.&....
|
||||
........*........467........*.........#..../..........*......................%....973..218..*..........@.......543......678.......*.........
|
||||
......32.106...$...*......260...........425.........912.................383..392.*...........503....546..212........%......./442.....221....
|
||||
..............668...593............422.......966*37................503..*.........776.....5$..............*......833.................&......
|
||||
............-...................21....*.-497............................133...........862......241.............-..........824...............
|
||||
.........215.......................851.........-........932........@./.......-.......-....%..................597..........*........@........
|
||||
................*323....557....782..........964...14..$....$.....631.144.....588.........316......................252..396........257...957.
|
||||
.............367........*......*.....64.97........=..976.....245................../982..........135...169........*.....................=....
|
||||
....513..........96.101..359.212.585..............................965*287.803.501.........460.........*.........618....98.208...............
|
||||
.............802*...+............#..............804..123...579*..............*.............*.......282.....263...........*..................
|
||||
.707....522....................................*........@......106..143.........716......770...........576*......................497........
|
||||
......#.../...=.........835............545*610.462..188............*.............*.....$...............................*115......*....*.....
|
||||
928%.606.......207.......*......61..........................797.....228..357....484..492..........247...............574..........880.994....
|
||||
...........541...........444......@....122......................505......+...14..........534........*.....210...........150.948..........210
|
||||
..............*..676*765...............*.....295.156...601#....*......-.......*.....709..........901.....*........714......*............&...
|
||||
.......723...299................325...965...........*.........656......156....824...../..............840.383...........249..........=.......
|
||||
..................................#........26*781.456................#.....................745......*.............165.*..........278..452...
|
||||
.746..............953.943.............................877.....59......128............#....+......585......641....%.....229...*2........*....
|
||||
...*.......614=......*.......903.............433.370...=...54....+..............&.....336.....$.............*..........................856..
|
||||
698...272.....................%......545.....-....$.............223.183..........339........189............994.......531.815*206............
|
||||
........./................657...........#...............571............=..-832.+....................876..............................754....
|
||||
.....&.....*960....628.............597.............747$.*......776..+..........709..................*..........266..........225.....*.......
|
||||
...541..511.............353.......*......................649.....*..753...719......212..526=...578..634..........*..........*......113......
|
||||
................996=...*...........18........#628..............321........*.......*...........*...................194....334.............126
|
||||
......................627..693.........248..........290.................@..204..=..247...574..311......791....................679*..........
|
||||
.......@....................=......283*............*.............38..214........90.........*.......447...+.............77...%.....265.......
|
||||
......566......&.................*..........965...929...........*......................869.908.753..$.......437....848*.....943.............
|
||||
...........403.950..............439............*............340.419...........868.....*...........*...128.....&.....................869.....
|
||||
............*..........637...............256.793........436*....................*.....85.361.....280..................349...................
|
||||
.........654...........*..............=.-........949............=....224..506.631....................*21.@...........%......................
|
||||
.............#..44.......105.108...190..........*....$173......750....*...../.........37.......-..461.....727...75.......................893
|
||||
......@...583.....*........*................358...........750........................*......532..................*...22...../....512...#....
|
||||
863...112................178...+...........*...........5./............98......584..222..........862...235.....448...*.....737.....*.....516.
|
||||
....#.......425..............923.84*......947......999*..............*....280*...........732...&.....*.............14.............683.......
|
||||
.....353............................914........105.................829...........112...............75.......................................
|
||||
10
2023/day-03/inputs/sample.txt
Normal file
10
2023/day-03/inputs/sample.txt
Normal file
@ -0,0 +1,10 @@
|
||||
467..114..
|
||||
...*......
|
||||
..35..633.
|
||||
......#...
|
||||
617*......
|
||||
.....+.58.
|
||||
..592.....
|
||||
......755.
|
||||
...$.*....
|
||||
.664.598..
|
||||
22
2023/day-03/part_one.zig
Normal file
22
2023/day-03/part_one.zig
Normal file
@ -0,0 +1,22 @@
|
||||
const std = @import("std");
|
||||
const common = @import("common.zig");
|
||||
|
||||
const data = @embedFile("inputs/puzzle.txt");
|
||||
|
||||
pub fn main() !void {
|
||||
const stdout = std.io.getStdOut().writer();
|
||||
|
||||
const schematic = try common.parse(data);
|
||||
|
||||
var sum: u32 = 0;
|
||||
|
||||
for (schematic.numbers.items) |row| {
|
||||
for (row.items) |num| {
|
||||
if (try num.has_adjacent_symbols(&schematic)) {
|
||||
sum += num.val;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
try stdout.print("{d}\n", .{sum});
|
||||
}
|
||||
49
2023/day-03/part_two.zig
Normal file
49
2023/day-03/part_two.zig
Normal file
@ -0,0 +1,49 @@
|
||||
const std = @import("std");
|
||||
const common = @import("common.zig");
|
||||
const alloc = std.heap.page_allocator;
|
||||
const List = std.ArrayList;
|
||||
const HashMap = std.AutoHashMap;
|
||||
|
||||
const data = @embedFile("inputs/puzzle.txt");
|
||||
|
||||
pub fn main() !void {
|
||||
const stdout = std.io.getStdOut().writer();
|
||||
|
||||
const schematic = try common.parse(data);
|
||||
|
||||
var sym_map = HashMap(common.Symbol, List(u32)).init(alloc);
|
||||
|
||||
for (schematic.numbers.items) |row| {
|
||||
for (row.items) |num| {
|
||||
const adjacent = try num.adjacent_symbols(&schematic);
|
||||
|
||||
for (adjacent.items) |sym| {
|
||||
if (sym.val == '*') {
|
||||
const entry = try sym_map.getOrPut(sym);
|
||||
|
||||
if (entry.found_existing) {
|
||||
try entry.value_ptr.*.append(num.val);
|
||||
} else {
|
||||
var list = List(u32).init(alloc);
|
||||
try list.append(num.val);
|
||||
entry.value_ptr.* = list;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
var sum: u32 = 0;
|
||||
|
||||
var iter = sym_map.iterator();
|
||||
while (iter.next()) |sym| {
|
||||
const nums = sym.value_ptr.*.items;
|
||||
|
||||
if (nums.len == 2) {
|
||||
const ratio = nums[0] * nums[1];
|
||||
sum += ratio;
|
||||
}
|
||||
}
|
||||
|
||||
try stdout.print("{d}\n", .{sum});
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user