voroskoi/aoc2023-zig - Change VU44HH5ME4RWPF6IU2OWWXCD73UB6QQLDJ7JRRZAMCVPIH26WQLAC

Solve day4

Created by voroskoi on December 20, 2023

VU44HH5ME4RWPF6IU2OWWXCD73UB6QQLDJ7JRRZAMCVPIH26WQLAC

Dependencies

In channels

main

Change contents

Replacement in src/main.zig at line 5 [3.50]
B:BD[3.105] → [2.0:16]
```
const DAYS = 2;
```
[3.105]
[3.121]
```
const DAYS = 4;
```
Replacement in src/main.zig at line 7 [3.50]
B:BD[3.122] → [3.122:147]
```
const aoc2022 = struct {
```
[3.122]
[3.147]
```
const aoc2023 = struct {
```

Insertion in src/main.zig at line 10 [3.50]

[2.57]

[3.187]

    const day03 = @import("day03.zig");
    const day04 = @import("day04.zig");

Insertion in src/main.zig at line 17 [3.50]

[2.88]

[3.228]

    _ = @import("day03.zig");
    _ = @import("day04.zig");

Replacement in src/main.zig at line 39 [3.50]

B:BD[3.849] → [3.849:944]

        const first_res = @field(aoc2022, day_str).first(arena.allocator()) catch unreachable;

[3.849]

[3.944]

        const first_res = @field(aoc2023, day_str).first(arena.allocator()) catch unreachable;

Replacement in src/main.zig at line 51 [3.50]

B:BD[3.1451] → [3.1451:1552]

            const second_res = @field(aoc2022, day_str).second(arena.allocator()) catch unreachable;

[3.1451]

[3.1552]

            const second_res = @field(aoc2023, day_str).second(arena.allocator()) catch unreachable;

File addition: day04.txt (----------)

[3.2193]

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Card 167: 29 20  7 63 39 51 25 15 62 60 | 60 44  5 32 10 99 53  6 33 42 98 94 62 83 12 29 24 54 20 13 73 79 61 14 45
Card 168: 81 74 27 44 71 80 30 29 90 60 | 64  6 76 84 54 85 80 92 36 90 40 78 94 50 55  5 29 12 34 20 13 62 28 82 70
Card 169: 42 48 39 85 46  3  1 55 33 70 | 90 30 50 31 95 88 80 46 53 39 15 89 51 76 48 33 97 28 75 63 38 72  1 17 47
Card 170: 78 40 42 30 31 46 48 92 41 53 | 31 20 28 17 98 54  5  1 44 91 97 40 42 73 65 83  6 75 68 93 95 86 82 30 34
Card 171: 30 54 32 34 69 29 88 81 84 60 | 62  7 39 59 64 80 14 77 10 85 46 38 69 63 30 81  5 33 89 72 87 70 43 17 98
Card 172: 52 59 65 99 20 71 10 70 89 92 |  5 84 49 90 77 56 79 16 75 29 11 94 32 59 96 33 87 65 39 14  1 98  7 58 63
Card 173: 13 83 77 47 66 22 90 15 56 27 | 13 86 82 35 23 34 45 53 67 88 74 85 75 16  4 87 48 83 64  8 17 89  6 70 12
Card 174:  7 19 64 23 74 44  8 88 11 15 | 93 37 46 50 70 87 14 66  1 24 45  3 84 85 31 79  2 49 83 36 99 12  9 39 71
Card 175: 95 59 37 26 89 35 54 79 91 70 | 23 55 96 44 14 98 81 10 82 32 78 43 72 25 62 31  1 51 30 24  4 33 63 76 93
Card 176: 82 85 29 74 55 93 70  8 65 51 | 24 36 70 34 18 55 74 28 11 93 65 72 86 56 98 82 35 48 67 22 85  4 90 29  8
Card 177: 10 67 13 30 97 26 50 60 90 11 | 10 60 67 50 65  9 45 97 17 90 29 26 30 20 71 54 13 11 25 74 49 28 59  1 22
Card 178: 97  4 21 34 17 56 61 16 46 62 | 56 16 34 42 54 97 78 50 72 21 31 10 46 12 62 27 68 70 61 88 91 17  4 11 77
Card 179: 37 14 25 29 77 12 57  9 11 56 |  4 56 18 44 37 27 42  6 82  9 25 50 52  1 14 26 12 39 57 87 29 11 98 47 77
Card 180: 99  7 27 95 34 96 18 84 13 81 | 11 19 23 48 62 94 81 24 95 34 27 13 61 80 84 99 73 77 96 79 22 82 18  7 14
Card 181: 21 78 27 22 23 42 31 13 88 32 | 57 59 68  7 24  4 83 98 81 36 41 20 21 44 45 51 66 65 46 73 60 62 52 16 26
Card 182: 19 69 85 77  2 99 30 51 84 67 | 77 34 43 69 35 58  9 13 74 42 33 19 44 99 30 51 20 83 78 73 92 84 85 81 31
Card 183:  5 53 84 22 88 55 72 76  2 60 | 16 55 77 76 72 83 52 84 69 87 88  9 35 60 85  2 53 43 63  5 58 67 56 26 22
Card 184: 84 40 17 12 19 36 27 21 57 91 | 88 54 18 84 95 57 27 94 96 44 39 62 77 12 87 98 14 67 19 46 43 71 40 33 36
Card 185: 55 16 42 78 53  7 33 14 34 27 | 51 96 13 61 82  9 34 35 94 14 60 15 85 87 90 92 37 41 99  1 16 81 58 36 53
Card 186: 89 35 24 19 64 68 12 33 51 57 | 37 51 76 19 12 57 71 36  7 33 25 44  2 59 91 56  8 42 68 35 64 24 77 70 89
Card 187: 13  3  5 21 32 14 68  7 52  8 | 28 55 17  7 18 76 68 74 20 44 30 94 52 54 67 81 31 84 75 29 32  4  8 45 43
Card 188: 27 62 22 79  8 47 34 73 84  7 | 23 24 36 62 94 50 47 75 32 90 22 44 45 93 34 10 84 71 79 59 25  8 69 30 16
Card 189:  2 66 50 43 23 47 41 78 51 36 | 53 37 17 90 32 40  6 20 10 72 77 89 70 61 95  4 21 50 85  8  9 34 52 24 92
Card 190: 50 72 64 97 46 90 55 10 38 98 | 19 85 33 18 86 10 12 81  4 50  9 68 73 44 96 38 45 27 87 15 99 63  7 52 75
Card 191: 18 38 73 48 19 66 10 79 80 89 | 40 91 88 41 80 77 71 83 68  6 27 37 74 84 11  8 50  7 20 54 48  9 23 21 16
Card 192: 40 67 24 38 51 84 87 50 82  8 | 50 14 97 51 41 24  8 73 29 40 27 18 94 67 31 45  5 58 84 26 77 16 47 60 99
Card 193: 68 13 32 37 43 48 10 24 90 60 | 25 90 96 92 57 15 11 97 83 54  4 17 20  8 26 39 50 94 40 71 76 43 55 67 98
Card 194: 72  7  8 11  3 39 25  4 32 84 | 22 64 51 41 13  7 59 84 32 10 72 81 61 17 52 58 31 89 95 54  8 92 56 28 15
Card 195: 95 18 43 83 12  8 13 54 71 80 | 27 41 56 65 84 99 74 57 25 38  4  1 66 77 86 11  5 58 47  8  6 55 68 40 85
Card 196: 48 42 11 29  9 85 81 54 90  5 | 19 58 33 55 95 92 40  4  8 84 35 53 14 60 23 25 98 21  9 90 93 82 43 37 38
Card 197: 85 88 32 15 25 54 79 27 90 82 | 77 32 41 70 76 68 71 10 67 31 64 92 42 74 58  7 18 65 99 93 50 38 63 45 82
Card 198: 58 67 42 84 62  1 65 92 86 23 | 28 36 58 48 17 82 20 63 78 59 34 61 91 21 11 40 83 97 47 89 18 64 70 85 50
Card 199: 74 30 60 87 46 21 69 51 28 96 | 92 64 32 66 65 54 29 85 84  2  6  3 97 37 22 33  1 23 38 88 75 99 17 12 31

File addition: day04.zig (----------)

[3.15]

const std = @import("std");
const PATH = "input/day04.txt";
pub fn first(allocator: std.mem.Allocator) !usize {
    const input = @embedFile(PATH);
    var global: usize = 0;
    var lines = std.mem.splitScalar(u8, input, '\n');
    while (lines.next()) |line| {
        if (line.len == 0) continue;
        var winners_ours = std.mem.tokenizeScalar(u8, line, '|');
        var wnums = std.AutoHashMap(u8, void).init(allocator);
        defer wnums.deinit();
        var sum: usize = 0;
        // handle winners
        {
            var winners = std.mem.tokenizeScalar(u8, winners_ours.next().?, ':');
            _ = winners.next(); // drop 'Card XX:'
            var nums = std.mem.tokenizeScalar(u8, winners.next().?, ' ');
            while (nums.next()) |num| {
                const n = try std.fmt.parseUnsigned(u8, num, 10);
                try wnums.put(n, {});
            }
        }
        // handle our numbers
        {
            var ours = std.mem.tokenizeScalar(u8, winners_ours.next().?, ' ');
            while (ours.next()) |our| {
                const n = try std.fmt.parseUnsigned(u8, our, 10);
                if (wnums.contains(n)) {
                    if (sum == 0) sum = 1 else sum *= 2;
                }
            }
        }
        global += sum;
    }
    return global;
}
pub fn second(allocator: std.mem.Allocator) !usize {
    // const input = test_input;
    const input = @embedFile(PATH);
    const ITEMS = 199;
    // Number of matching numbers on each card
    var matches: [ITEMS]u4 = [_]u4{0} ** ITEMS;
    // Copies counter for each card (at the beginning we have 1 piece of each card)
    var wins: [ITEMS]u32 = [_]u32{1} ** ITEMS;
    var card_number: usize = 0;
    var lines = std.mem.splitScalar(u8, input, '\n');
    while (lines.next()) |line| {
        if (line.len == 0) continue;
        defer card_number += 1;
        var winners_ours = std.mem.tokenizeScalar(u8, line, '|');
        var wnums = std.AutoHashMap(u8, void).init(allocator);
        defer wnums.deinit();
        var sum: u4 = 0;
        // handle winners
        {
            var winners = std.mem.tokenizeScalar(u8, winners_ours.next().?, ':');
            _ = winners.next(); // drop 'Card XX:'
            var nums = std.mem.tokenizeScalar(u8, winners.next().?, ' ');
            while (nums.next()) |num| {
                const n = try std.fmt.parseUnsigned(u8, num, 10);
                try wnums.put(n, {});
            }
        }
        // handle our numbers
        {
            var ours = std.mem.tokenizeScalar(u8, winners_ours.next().?, ' ');
            while (ours.next()) |our| {
                const n = try std.fmt.parseUnsigned(u8, our, 10);
                if (wnums.contains(n)) {
                    sum += 1;
                }
            }
        }
        matches[card_number] = sum;
        // collect the copies won
        for (0..sum) |i| {
            wins[card_number + 1 + i] += wins[card_number];
        }
    }
    // std.debug.print("{any}\n", .{matches});
    // std.debug.print("{any}\n", .{wins});
    var sum: usize = 0;
    for (wins) |val| {
        sum += val;
    }
    return sum;
}
test "day04a" {
    try std.testing.expectEqual(@as(usize, 23847), try first(std.testing.allocator));
}
test "day04b" {
    try std.testing.expectEqual(@as(usize, 8570000), try second(std.testing.allocator));
}
const test_input =
    \\Card 1: 41 48 83 86 17 | 83 86  6 31 17  9 48 53
    \\Card 2: 13 32 20 16 61 | 61 30 68 82 17 32 24 19
    \\Card 3:  1 21 53 59 44 | 69 82 63 72 16 21 14  1
    \\Card 4: 41 92 73 84 69 | 59 84 76 51 58  5 54 83
    \\Card 5: 87 83 26 28 32 | 88 30 70 12 93 22 82 36
    \\Card 6: 31 18 13 56 72 | 74 77 10 23 35 67 36 11
;

Replacement in build.zig at line 8 [3.29089]
B:BD[3.29325] → [3.29325:29352]
```
        .name = "aoc2022",
```
[3.29325]
[3.29352]
```
        .name = "aoc2023",
```