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#include <algorithm>
#include <fstream>
#include <iostream>
#include <iterator>
#include <numeric>
#include <string>
#include <vector>
using namespace std;
auto
read_file(string_view filename)
{
fstream input{ filename };
return vector<string>{ istream_iterator<string>{ input }, istream_iterator<string>{} };
}
auto
to_int(string_view str)
{
auto result = 0U;
for ( auto chr: str ) {
result <<= 1U;
if ( chr == 'B' || chr == 'R' ) {
result |= 1U;
}
}
return result;
}
void
part1(const vector<string>& lines)
{
auto value = 0U;
for ( const auto& line: lines ) {
value = max(value, to_int(line));
}
cout << value << endl;
}
void
part2(const vector<string>& lines)
{
vector<unsigned int> values;
transform(lines.begin(), lines.end(), back_inserter(values), to_int);
sort(values.begin(), values.end());
for ( size_t idx = 1; idx != values.size(); ++idx ) {
if ( values[idx - 1] != values[idx] - 1 ) {
cout << values[idx] - 1 << endl;
break;
}
}
}
int
main()
{
auto lines = read_file("data/day05.txt");
part1(lines);
part2(lines);
}
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