rDramaAdvent of Code Day 4: Back on Track Edition

It was easier than yesterday, managed to complete it with much fewer lines

!codecels

Tried to use the new std::views std library which is kinda useful, but gives absolutely unhelpful error messages:

<g>\>[build] FAILED: day04/CMakeFiles/day04.dir/main.cpp.o </g>
[build] /usr/bin/ccache /usr/bin/clang++-17 -DINPUT_DIR=\"/home/ihsoy/adventofcode/inputs/\" -DSCN_HEADER_ONLY=0 -I/home/ihsoy/adventofcode/.cache/CPM/scn/ee384e4dfeb40efb93d1b2a397a81e8027027f77/include -stdlib=libc++ -g -std=c++23 -fcolor-diagnostics -MD -MT day04/CMakeFiles/day04.dir/main.cpp.o -MF day04/CMakeFiles/day04.dir/main.cpp.o.d -o day04/CMakeFiles/day04.dir/main.cpp.o -c /home/ihsoy/adventofcode/day04/main.cpp
[build] /home/ihsoy/adventofcode/day04/main.cpp:53:95: error: invalid operands to binary expression ('std::__1::ranges::transform_view<std::__1::ranges::filter_view<std::__1::ranges::split_view<std::__1::ranges::subrange<const char *>, std::__1::ranges::single_view<char>>, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:42:89)>, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:44:50)>' and 'int')
[build]    53 |         auto numbers_won = numbers_played | std::views::filter([](https://auto number) { return number%2==0; });
[build]       |                                                                                         ~~~~~~^~
[build] /usr/lib/llvm-17/bin/../include/c++/v1/__type_traits/invoke.h:337:10: note: in instantiation of function template specialization 'day03::solution(const std::vector<std::string> &)::(anonymous class)::operator()<std::__1::ranges::transform_view<std::__1::ranges::filter_view<std::__1::ranges::split_view<std::__1::ranges::subrange<const char *>, std::__1::ranges::single_view<char>>, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:42:89)>, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:44:50)>>' requested here
[build]   337 | decltype(std::declval<_Fp>()(std::declval<_Args>()...))
[build]       |          ^
[build] /usr/lib/llvm-17/bin/../include/c++/v1/__type_traits/invoke.h:347:19: note: while substituting deduced template arguments into function template '__invoke' [with _Fp = (lambda at /home/ihsoy/adventofcode/day04/main.cpp:53:64) &, _Args = <std::__1::ranges::transform_view<std::__1::ranges::filter_view<std::__1::ranges::split_view<std::__1::ranges::subrange<const char *>, std::__1::ranges::single_view<char>>, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:42:89)>, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:44:50)> &>]
[build]   347 |   static decltype(std::__invoke(std::declval<_XFp>(), std::declval<_XArgs>()...)) __try_call(int);
[build]       |                   ^
[build] /usr/lib/llvm-17/bin/../include/c++/v1/__type_traits/invoke.h:353:28: note: while substituting deduced template arguments into function template '__try_call' [with _XFp = (lambda at /home/ihsoy/adventofcode/day04/main.cpp:53:64) &, _XArgs = (no value)]
[build]   353 |   using _Result = decltype(__try_call<_Fp, _Args...>(0));
[build]       |                            ^
[build] /usr/lib/llvm-17/bin/../include/c++/v1/__type_traits/invoke.h:401:24: note: in instantiation of template class 'std::__invokable_r<void, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:53:64) &, std::__1::ranges::transform_view<std::__1::ranges::filter_view<std::__1::ranges::split_view<std::__1::ranges::subrange<const char *>, std::__1::ranges::single_view<char>>, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:42:89)>, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:44:50)> &>' requested here
[build]   401 |     : public enable_if<__invokable<_Fp, _Args...>::value, typename __invokable_r<void, _Fp, _Args...>::_Result> {};
[build]       |                        ^
[build] /usr/lib/llvm-17/bin/../include/c++/v1/__type_traits/invoke.h:452:45: note: in instantiation of template class 'std::__invoke_of<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:53:64) &, std::__1::ranges::transform_view<std::__1::ranges::filter_view<std::__1::ranges::split_view<std::__1::ranges::subrange<const char *>, std::__1::ranges::single_view<char>>, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:42:89)>, (lambda at /home/ihsoy/adventofcode/day04/main.cpp:44:50)> &>' requested here
[build]   452 | struct _LIBCPP_TEMPLATE_VIS invoke_result : __invoke_of<_Fn, _Args...> {};
[build]       |                                             ^
[build] /usr/lib/llvm-17/bin/../include/c++/v1/__type_traits/invoke.h:455:1: note: (skipping 39 contexts in backtrace; use -ftemplate-backtrace-limit=0 to see all)
[build]   455 | using invoke_result_t = typename invoke_result<_Fn, _Args...>::type;
[build]       | ^
[build] /usr/lib/llvm-17/bin/../include/c++/v1/__concepts/invocable.h:27:21: note: while substituting template arguments into constraint expression here
[build]    27 | concept invocable = requires(_Fn&& __fn, _Args&&... __args) {
[build]       |                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[build]    28 |   _VSTD::invoke(_VSTD::forward<_Fn>(__fn), _VSTD::forward<_Args>(__args)...); // not required to be equality preserving
[build]       |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[build]    29 | };
[build]       | <del>
[build] /usr/lib/llvm-17/bin/../include/c++/v1/__ranges/range_adaptor.h:61:18: note: while checking the satisfaction of concept 'invocable<std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__filter::__fn, std::tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:53:64)>>>, std::__1::ranges::drop_view<std::__1::ranges::transform_view<std::__1::ranges::split_view<std::string_view, std::__1::ranges::single_view<char>>, std::__range_adaptor_closure_t<std::__compose_t<std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__transform::__fn, std::tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:44:50)>>>, std::__range_adaptor_closure_t<std::__compose_t<std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__filter::__fn, std::tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:42:89)>>>, std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__split_view::__fn, std::tuple<char>>>>>>>>> &>' requested here
[build]    61 |                  invocable<_Closure, _View>
[build]       |                  ^</del>~~~~~~~~~~~~~~~~~~~~~~~
[build] /usr/lib/llvm-17/bin/../include/c++/v1/__ranges/range_adaptor.h:61:18: note: while substituting template arguments into constraint expression here
[build]    61 |                  invocable<_Closure, _View>
[build]       |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
[build] /home/ihsoy/adventofcode/day04/main.cpp:53:43: note: while checking constraint satisfaction for template 'operator|<std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__filter::__fn, std::tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:53:64)>>>>' required here
[build]    53 |         auto numbers_won = numbers_played | std::views::filter([](https://auto number) { return number%2==0; });
[build]       |                                           ^
[build] /home/ihsoy/adventofcode/day04/main.cpp:53:43: note: in instantiation of function template specialization 'std::__1::operator|<std::__1::ranges::drop_view<std::__1::ranges::transform_view<std::__1::ranges::split_view<std::string_view, std::__1::ranges::single_view<char>>, std::__range_adaptor_closure_t<std::__compose_t<std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__transform::__fn, std::tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:44:50)>>>, std::__range_adaptor_closure_t<std::__compose_t<std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__filter::__fn, std::tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:42:89)>>>, std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__split_view::__fn, std::tuple<char>>>>>>>>> &, std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__filter::__fn, std::tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:53:64)>>>>' requested here
[build] /home/ihsoy/adventofcode/day04/main.cpp:53:43: error: invalid operands to binary expression ('invoke_result_t<__range_adaptor_closure_t<__bind_back_t<__fn, tuple<int>>>, transform_view<split_view<string_view, single_view<char>>, __range_adaptor_closure_t<__compose_t<__range_adaptor_closure_t<__bind_back_t<__fn, tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:44:50)>>>, __range_adaptor_closure_t<__compose_t<__range_adaptor_closure_t<__bind_back_t<__fn, tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:42:89)>>>, __range_adaptor_closure_t<__bind_back_t<__fn, tuple<char>>>>>>>> &>' (aka 'std::__1::ranges::drop_view<std::__1::ranges::transform_view<std::__1::ranges::split_view<std::string_view, std::__1::ranges::single_view<char>>, std::__range_adaptor_closure_t<std::__compose_t<std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__transform::__fn, std::tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:44:50)>>>, std::__range_adaptor_closure_t<std::__compose_t<std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__filter::__fn, std::tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:42:89)>>>, std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__split_view::__fn, std::tuple<char>>>>>>>>>') and '__range_adaptor_closure_t<__bind_back_t<__fn, tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:53:64)>>>' (aka 'std::__range_adaptor_closure_t<std::__bind_back_t<std::__1::ranges::views::__filter::__fn, std::tuple<(lambda at /home/ihsoy/adventofcode/day04/main.cpp:53:64)>>>'))
``

I did part two with List<Stack<string>>

lmao can't post code but it took like 3 minutes to run

The instructions for 2 were very confusing but the actual puzzle was pretty simple

Another "the hardest part is parsing the input" question

s←~⍤∊⍨⊆⊢ ⋄ n←≢r←{⍎¨'|'s 2⊃':'s ⍵}¨⊃⎕NGET'i4.txt'1
⎕←+/⌊2*1-⍨w←+/¨¨∊/¨r
t←n/1 ⋄ w{t⊢←t+(⍵⊃t)×n↑(⍵\0),⍺\1}¨⍳n ⋄ ⎕←+/t

A neat little dynamic programming method of solving it. Just start at the end and use your previous solutions to calculate the current one.

Alright.. so..... It's been executing for about 3-5 hours now

I'm unable to actually verify that the 2nd part is solved but I'm pretty sure it is

Can't tell if

>skill issue

or shell issue

either way I'm gonna switch to php I am not skilled enough to continue with shell lmao

Good ol' php to save the day

Sets make this pretty easy

f = open('AOC2023Day4.txt')
import numpy as np
from collections import defaultdict
numscr = defaultdict(lambda: 1)
numscr[1] = 1
lines = f.read().strip().split('\n')
total = 0
i = 1
for line in lines:
   line = line.split(':')[-1].split('|')
   #print(line[1].strip().split(' '))
   winning = set([int(i) for i in line[0].strip().split(' ') if i != ''])
   nums = set([int(i) for i in line[1].strip().split(' ') if i != ''])
   mine = winning.intersection(nums)
   #print(mine)
   add = 0
   i += 1
   if len(mine) > 0:
       add = np.power(2,len(mine)-1)
       for j in range(i,i+len(mine)):
           numscr[j] += numscr[i-1]
   total += add
#print(numscr)
ncards = 0
for i in range(len(lines)):
   ncards += numscr[i]
print(ncards)
print(total)

yesterday's was really annoying and after four days of string parsing problems, it was pretty easy

edit: oh yeah I should have used hash for performance reasons but oh well.

Day 4 and I already crashed the compiler:

Passing anything but an int or string to arrayWith causes an internal compiler error. This includes integer literals.

I am clinically r-slurred and wasted like 15 minutes repeatedly coding the wrong implementation of what they wanted in the second part, checking the spec, and then modifying my code to a new, still incorrect, behavior

Hardest part was understanding wtf part 2 wanted me to do.

Like day 2 felt easier than day 1, today was easier than yesterday.

FRICK c++ I'm done with it after today's expedition into "dude, why isn't my vector erasing"

idk if im burnt out from tutoring bootcampers worse than i am over zoom for 3 hours or if its because i havent had a drink in 3 days but i still have no fricking clue what part 2 is trying to ask me to do so i shamelessly stole that part

Snapshots:

https://carbon.vercel.app:

• ghostarchive.org

• archive.org

• archive.ph (click to archive)

https://adventofcode.com/2023:

• ghostarchive.org

• archive.org

• archive.ph (click to archive)