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#include <algorithm>
#include <filesystem>
#include <fstream>
#include <iostream>
#include <set>
#include <sstream>
#include <string>
using namespace std;
namespace {
vector<string>
read_lines(const filesystem::path& filename)
{
ifstream file{ filename };
vector<string> lines;
for ( string line; getline(file, line); ) {
lines.emplace_back(line);
}
return lines;
}
vector<string>
split(const string& line)
{
stringstream strm{ line };
vector<string> words;
for ( string word; strm >> word; ) {
words.emplace_back(word);
}
return words;
}
void
part1(const vector<string>& lines)
{
auto num = ranges::count_if(lines, [](const string& line) {
auto words = split(line);
set<string> set{ words.begin(), words.end() };
return set.size() == words.size();
});
cout << "Part1: " << num << '\n';
}
void
part2(const vector<string>& lines)
{
auto num = ranges::count_if(lines, [](const string& line) {
auto words = split(line);
set<string> set;
for ( auto word: words ) {
ranges::sort(word);
set.insert(word);
}
return set.size() == words.size();
});
cout << "Part2: " << num << '\n';
}
} // namespace
int
main()
{
auto lines = read_lines("data/day04.txt");
part1(lines);
part2(lines);
}
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