1 files changed, 100 insertions, 0 deletions

diff --git a/src/day02.cpp b/src/day02.cpp
new file mode 100644
index 0000000..df560c3
--- /dev/null
+++ b/src/day02.cpp
@@ -0,0 +1,100 @@
+#include <cctype>
+#include <cstdio>
+#include <fstream>
+#include <iostream>
+#include <map>
+#include <sstream>
+#include <string>
+#include <vector>
+using namespace std;
+
+vector<string>
+split(const string& line, char sep)
+{
+        vector<string> parts{};
+        stringstream   input{ line };
+
+        for ( string part; getline(input, part, sep); ) {
+                parts.emplace_back(part);
+        }
+
+        return parts;
+}
+
+void
+part1()
+{
+        fstream input{ "data/day02.txt" };
+
+        auto sum = 0;
+        for ( string line; getline(input, line); ) {
+                auto game = split(line, ':');
+
+                auto gameId = 0;
+                sscanf(game[0].data(), "Game %d", &gameId); // NOLINT
+
+                auto subsets = split(game[1], ';');
+
+                auto fail = false;
+
+                for ( const auto& subset: subsets ) {
+                        auto cubes = split(subset, ',');
+
+                        map<string, int> counts{};
+
+                        for ( const auto& cube: cubes ) {
+                                auto data = split(cube, ' ');
+
+                                auto count = stoi(data[1]);
+                                auto color = data[2];
+
+                                counts[color] += count;
+                        }
+
+                        fail |= (counts["red"] > 12) || (counts["green"] > 13) || (counts["blue"] > 14); // NOLINT
+                }
+
+                if ( !fail ) {
+                        sum += gameId;
+                }
+        }
+        cout << sum << endl;
+}
+
+void
+part2()
+{
+        fstream input{ "data/day02.txt" };
+
+        auto sum = 0;
+
+        for ( string line; getline(input, line); ) {
+                auto game = split(line, ':');
+
+                auto subsets = split(game[1], ';');
+
+                map<string, int> colors{};
+
+                for ( const auto& subset: subsets ) {
+                        auto cubes = split(subset, ',');
+
+                        for ( const auto& cube: cubes ) {
+                                auto data = split(cube, ' ');
+
+                                auto count = stoi(data[1]);
+                                auto color = data[2];
+
+                                colors[color] = max(colors[color], count);
+                        }
+                }
+                sum += colors["red"] * colors["green"] * colors["blue"];
+        }
+        cout << sum << endl;
+}
+
+int
+main()
+{
+        part1();
+        part2();
+}