38 lines
1.0 KiB
Zig
38 lines
1.0 KiB
Zig
const std = @import("std");
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pub fn main() !void {
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var file = try std.fs.cwd().openFile("inputs/day1.txt", .{});
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defer file.close();
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var buf_reader = std.io.bufferedReader(file.reader());
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var in_stream = buf_reader.reader();
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var buf: [1024]u8 = undefined;
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var elf_sums: [1024]i32 = [_]i32{0} ** 1024;
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var i: usize = 0;
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while (try in_stream.readUntilDelimiterOrEof(&buf, '\n')) |line| {
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if (line.len == 0) {
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i += 1;
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}
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else {
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const calorie_count = std.fmt.parseInt(i32, line, 10) catch |err| {
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std.debug.print("Error converting str: {?}\n", .{err});
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return;
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};
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elf_sums[i] += calorie_count;
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}
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}
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std.sort.sort(i32, &elf_sums, {}, std.sort.desc(i32));
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var sum: i32 = 0;
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for (elf_sums[0..3]) |value, index| {
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std.debug.print("Pos {} = {}\n", .{index+1, value});
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sum += value;
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}
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std.debug.print("Total calories of the top three elves: {}\n", .{sum});
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} |