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#include <fstream>
#include <iostream>
#include <string>
#include <vector>
using namespace std;
auto
read_file(string_view filename)
{
fstream input{ filename };
vector<string> lines;
for ( string line; getline(input, line); ) {
lines.emplace_back(line);
}
return lines;
}
void
part1(const vector<string>& lines)
{
auto count = [](const string& line) -> size_t {
size_t length = 0;
auto iter = begin(line);
while ( iter != end(line) ) {
if ( *iter == '\\' ) {
++iter;
if ( *iter == '\\' || *iter == '"' ) {
++length;
++iter;
}
else if ( *iter == 'x' ) {
++length;
iter += 3;
}
}
else {
++iter;
++length;
}
}
return length - 2;
};
size_t sum = 0;
for ( const auto& line: lines ) {
sum += line.size() - count(line);
}
cout << sum << endl;
}
void
part2(const vector<string>& lines)
{
long sum = 0;
for ( const auto& line: lines ) {
sum += 2 + count_if(begin(line), end(line), [](auto chr) { return chr == '\\' || chr == '"'; });
}
cout << sum << endl;
}
int
main()
{
auto lines = read_file("data/day08.txt");
part1(lines);
part2(lines);
}
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