66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
#include <algorithm>
|
|
#include <array>
|
|
#include <cstdint>
|
|
#include <iostream>
|
|
#include <stdexcept>
|
|
#include <string>
|
|
#include <limits>
|
|
|
|
#include <boost/range/irange.hpp>
|
|
|
|
#include <doctest.h>
|
|
|
|
#include <aocpp/Startup.hpp>
|
|
|
|
namespace {
|
|
|
|
auto Solve(std::string const& input, std::size_t n) -> std::size_t
|
|
{
|
|
std::array<std::size_t, 256> counts {};
|
|
std::size_t uniques {0};
|
|
|
|
auto const inc = [&](char c) {
|
|
uniques += 1 == ++counts[static_cast<std::uint8_t>(c)];
|
|
};
|
|
|
|
auto const dec = [&](char c) {
|
|
uniques -= 0 == --counts[static_cast<std::uint8_t>(c)];
|
|
};
|
|
|
|
for (auto const i : boost::irange(n)) {
|
|
inc(input[i]);
|
|
}
|
|
|
|
for (auto const i : boost::irange(n, input.size())) {
|
|
dec(input[i-n]);
|
|
inc(input[i]);
|
|
if (uniques == n) { return i+1; }
|
|
}
|
|
|
|
throw std::runtime_error{"bad input"};
|
|
}
|
|
|
|
} // namespace
|
|
|
|
TEST_SUITE("2022-06 examples") {
|
|
TEST_CASE("examples") {
|
|
CHECK(Solve("bvwbjplbgvbhsrlpgdmjqwftvncz", 4) == 5);
|
|
CHECK(Solve("nppdvjthqldpwncqszvftbrmjlhg", 4) == 6);
|
|
CHECK(Solve("nznrnfrfntjfmvfwmzdfjlvtqnbhcprsg", 4) == 10);
|
|
CHECK(Solve("zcfzfwzzqfrljwzlrfnpqdbhtmscgvjw", 4) == 11);
|
|
|
|
CHECK(Solve("mjqjpqmgbljsphdztnvjfqwrcgsmlb", 14) == 19);
|
|
CHECK(Solve("bvwbjplbgvbhsrlpgdmjqwftvncz", 14) == 23);
|
|
CHECK(Solve("nppdvjthqldpwncqszvftbrmjlhg", 14) == 23);
|
|
CHECK(Solve("nznrnfrfntjfmvfwmzdfjlvtqnbhcprsg", 14) == 29);
|
|
CHECK(Solve("zcfzfwzzqfrljwzlrfnpqdbhtmscgvjw", 14) == 26);
|
|
}
|
|
}
|
|
|
|
auto main(int argc, char** argv) -> int {
|
|
std::string input;
|
|
std::getline(*aocpp::Startup(argc, argv), input);
|
|
std::cout << "Part 1: " << Solve(input, 4) << std::endl;
|
|
std::cout << "Part 2: " << Solve(input, 14) << std::endl;
|
|
}
|