65 lines
1.8 KiB
Zig
65 lines
1.8 KiB
Zig
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const std = @import("std");
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const mem = std.mem;
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const fmt = std.fmt;
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const print = std.debug.print;
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const input = @embedFile("input");
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pub fn main() !void {
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const checked_len : usize = 'z' + 1;
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var checked_1 = [_]bool{false} ** checked_len;
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var checked_2 = [_]bool{false} ** checked_len;
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var total_points : usize = 0;
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var line_count : u3 = 0;
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// Split the input
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var input_iter = mem.split(u8, input, "\n");
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while (input_iter.next()) |line| {
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if (line.len == 0) continue;
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switch (line_count) {
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0 => {
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for (line) |letter| {
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checked_1[letter] = true;
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}
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},
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1 => {
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for (line) |letter| {
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checked_2[letter] = true;
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}
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},
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else => {
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for (line) |letter| {
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if (checked_1[letter] and checked_2[letter]) {
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if (letter >= 'a' and letter <= 'z') {
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total_points += letter % 'a' + 1;
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// std.debug.print("{c}:{}\n", .{letter, letter % 'a' + 1});
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}
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if (letter >= 'A' and letter <= 'Z') {
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total_points += letter % 'A' + 27;
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// std.debug.print("{c}:{}\n", .{letter, letter % 'A' + 27});
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}
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// Only one item is repeated
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break;
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}
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}
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// Reset the checked letters
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checked_1 = [_]bool{false} ** checked_len;
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checked_2 = [_]bool{false} ** checked_len;
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}
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}
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line_count = (line_count + 1) % 3;
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}
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std.debug.print("Points: {}\n", .{total_points});
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}
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