aocpp/2017/10.cpp

#include <cstdint>
#include <string>
#include <iostream>
#include <vector>

#include <doctest.h>

#include <aocpp/Startup.hpp>
#include <aocpp/Parsing.hpp>
#include <knothash.hpp>

auto Main(std::istream & in, std::ostream & out) -> void
{
  std::string line;
  std::getline(in, line);

  std::vector<std::uint8_t> lengths1;
  for (auto && x : aocpp::SplitOn(line, ",")) {
    lengths1.push_back(std::stoul(x));
  }

  auto result = knothash::hash_ex<256>(1, lengths1.begin(), lengths1.end());
  out << "Part 1: " << long{result[0]} * long{result[1]} << std::endl;

  out << "Part 2: " << knothash::render(knothash::hash(line)) << std::endl;
}