Day 7 part 1 brute-forced
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@ -1,7 +1,14 @@
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const std = @import("std");
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const common = @import("./common.zig");
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// TODO: solution to day 6
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pub fn main() !void {
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var fileContents = try common.readFileContents("/home/daniel/.home/.cache/aoc2021/6.input");
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const stdout = std.io.getStdOut().writer();
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try stdout.print("Hello, {s}!\n", .{"world"});
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try stdout.print("{s}", .{fileContents});
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}
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/// Calculate lanternFish value
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fn lanternFish() i32 {
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return 48;
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}
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18
2021/common.zig
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18
2021/common.zig
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const std = @import("std");
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pub fn readFileContents(file_path: []const u8, alloc: *std.mem.Allocator) anyerror![]u8 {
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var gp = std.heap.GeneralPurposeAllocator(.{.safety = true}){};
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defer _ = gp.deinit();
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const alloc = &gp.allocator;
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var path_buffer: [std.fs.MAX_PATH_BYTES]u8 = undefined;
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const path = try std.fs.realpath(file_path, &path_buffer);
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const file = try std.fs.openFileAbsolute(path, .{ .read = true });
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defer file.close();
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const fb = try file.readToEndAlloc(alloc, 50000);
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defer alloc.free(fb);
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return fb;
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}
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20
2021/seven.nim
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20
2021/seven.nim
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import std/[strutils, sequtils, tables, strformat]
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import ./common
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proc crabsDistance(input: string): int =
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result = int.high()
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var max_try = 0
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let dists = input.split(',').map(parseInt)
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for d in dists:
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if d > max_try: max_try = d
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for t in 0..max_try:
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let fuel = dists.foldl(a + abs(b - t), 0)
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if fuel < result: result = fuel
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let input = 7.loadInputText()
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time("day 7 part 1"): echo input.crabsDistance()
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# time("day 7 part 2"): echo "?"
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when not defined(release):
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let testInput = "16,1,2,0,4,2,7,1,2,14"
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doAssert testInput.crabsDistance() == 37
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