1 files changed, 0 insertions, 114 deletions

diff --git a/src/day04.cpp b/src/day04.cpp
deleted file mode 100644
index 0d3e552..0000000
--- a/src/day04.cpp
+++ /dev/null
@@ -1,114 +0,0 @@
-#include <fstream>
-#include <iostream>
-#include <set>
-#include <sstream>
-#include <string>
-#include <string_view>
-#include <vector>
-
-using namespace std;
-
-vector<string>
-read_file(string_view filename)
-{
-        fstream        input{ filename };
-        vector<string> data;
-
-        for ( string line; getline(input, line); ) {
-                data.emplace_back(line);
-        }
-
-        return data;
-}
-
-vector<string>
-split(const string& line, char sep)
-{
-        stringstream   input{ line };
-        vector<string> parts;
-
-        for ( string part; getline(input, part, sep); ) {
-                parts.emplace_back(part);
-        }
-
-        return parts;
-}
-
-template<typename Container>
-Container
-read_ints(const string& line)
-{
-        Container    container{};
-        stringstream input{ line };
-
-        for ( typename Container::value_type value; input >> value; ) {
-                container.emplace(value);
-        }
-
-        return container;
-}
-
-auto
-build_data_set(string_view filename)
-{
-        vector<unsigned long> values;
-
-        for ( const auto& line: read_file(filename) ) {
-                const auto cards   = split(line, ':');
-                const auto numbers = split(cards[1], '|');
-
-                const auto winning_numbers = read_ints<set<int>>(numbers[0]);
-                const auto card_numbers    = read_ints<set<int>>(numbers[1]);
-
-                auto count = 0U;
-                for ( auto number: winning_numbers ) {
-                        if ( card_numbers.contains(number) ) {
-                                ++count;
-                        }
-                }
-                values.emplace_back(count);
-        }
-
-        return values;
-}
-
-void
-pass1(const vector<unsigned long>& values)
-{
-        auto sum = 0U;
-        for ( auto value: values ) {
-                if ( value != 0 ) {
-                        sum += (1U << (value - 1));
-                }
-        }
-
-        cout << sum << endl;
-}
-
-void
-pass2(const vector<unsigned long>& values)
-{
-        auto count = 0U;
-
-        function<void(size_t, size_t)> process = [&](size_t start, size_t end) -> void {
-                for ( ; start != end; ++start ) {
-                        auto value = values[start];
-
-                        ++count;
-
-                        process(start + 1, start + value + 1);
-                }
-        };
-
-        process(0, values.size());
-
-        cout << count << endl;
-}
-
-int
-main()
-{
-        const auto values = build_data_set("data/day04.txt");
-        pass1(values);
-        pass2(values);
-}