From 1088bfbda97eb89bf55fd7cd171726eb7f6ea71f Mon Sep 17 00:00:00 2001
From: Thomas Schmucker <ts@its1.de>
Date: Wed, 24 Apr 2024 23:22:18 +0200
Subject: day02, advent of code 2022

---
 2022/src/day02.cpp | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 2022/src/day02.cpp

diff --git a/2022/src/day02.cpp b/2022/src/day02.cpp
new file mode 100644
index 0000000..65146d5
--- /dev/null
+++ b/2022/src/day02.cpp
@@ -0,0 +1,85 @@
+#include <fstream>
+#include <iostream>
+#include <map>
+#include <string>
+#include <vector>
+using namespace std;
+
+vector<tuple<int, int>>
+read_file(string_view filename)
+{
+	fstream                 input{ filename };
+	vector<tuple<int, int>> data;
+
+	for ( string line; getline(input, line); ) {
+		data.emplace_back(line[0] - 'A' + 1, line[2] - 'X' + 1);
+	}
+
+	return data;
+}
+
+void
+part1(const vector<tuple<int, int>>& lines)
+{
+	map<int, int> wins{
+		{ 1, 2 },
+		{ 2, 3 },
+		{ 3, 1 }
+	};
+
+	static const int INC_DRAW = 3;
+	static const int INC_WIN  = 6;
+
+	int score = 0;
+	for ( auto [a, b]: lines ) {
+		score += b;
+		if ( a == b ) {
+			score += INC_DRAW;
+		}
+		else if ( wins[a] == b ) {
+			score += INC_WIN;
+		}
+	}
+	cout << score << endl;
+}
+
+void
+part2(const vector<tuple<int, int>>& lines)
+{
+	map<int, int> wins{
+		{ 1, 2 },
+		{ 2, 3 },
+		{ 3, 1 }
+	};
+
+	map<int, int> loose{
+		{ 2, 1 },
+		{ 3, 2 },
+		{ 1, 3 }
+	};
+
+	static const int INC_DRAW = 3;
+	static const int INC_WIN  = 6;
+
+	int score = 0;
+	for ( auto [a, b]: lines ) {
+		if (b == 2) {
+			score += a + INC_DRAW;
+		}
+		else if (b == 3) {
+			score += wins[a] + INC_WIN;
+		}
+		else {
+			score += loose[a];
+		}
+	}
+	cout << score << endl;
+}
+
+int
+main()
+{
+	auto lines = read_file("data/day02.txt");
+	part1(lines);
+	part2(lines);
+}
-- 
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