From dcca312c9b1b5311c30d1f1ade9765d2a102913d Mon Sep 17 00:00:00 2001
From: Thomas Schmucker <ts@its1.de>
Date: Sat, 2 Dec 2023 09:08:01 +0100
Subject: Bessere Dateinamen

---
 src/day01.cpp | 82 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 src/day01.cpp

(limited to 'src/day01.cpp')

diff --git a/src/day01.cpp b/src/day01.cpp
new file mode 100644
index 0000000..ff357bc
--- /dev/null
+++ b/src/day01.cpp
@@ -0,0 +1,82 @@
+#include <algorithm>
+#include <fstream>
+#include <iostream>
+#include <map>
+#include <string>
+#include <vector>
+using namespace std;
+
+void
+part1()
+{
+	string  digits{ "0123456789" };
+	fstream input{ "data/day01.txt" };
+
+	int sum = 0;
+	for ( string line; input >> line; ) {
+		auto first = find_first_of(begin(line), end(line), begin(digits), end(digits));
+		auto last  = find_first_of(rbegin(line), rend(line), begin(digits), end(digits));
+
+		auto value = (*first - '0') * 10 + (*last - '0');
+
+		sum += value;
+	}
+	cout << sum << endl;
+}
+
+void
+part2()
+{
+	map<string, int> map{
+		{ "0", 0 },
+		{ "1", 1 },
+		{ "2", 2 },
+		{ "3", 3 },
+		{ "4", 4 },
+		{ "5", 5 },
+		{ "6", 6 },
+		{ "7", 7 },
+		{ "8", 8 },
+		{ "9", 9 },
+		{ "one", 1 },
+		{ "two", 2 },
+		{ "three", 3 },
+		{ "four", 4 },
+		{ "five", 5 },
+		{ "six", 6 },
+		{ "seven", 7 },
+		{ "eight", 8 },
+		{ "nine", 9 },
+	};
+
+	fstream input{ "data/day01.txt" };
+
+	auto sum = 0;
+	for ( string line; input >> line; ) {
+		string      sub;
+		vector<int> digits;
+
+		for ( auto ch: line ) {
+			sub += ch;
+
+			for ( const auto& word: map ) {
+				if ( sub.ends_with(word.first) ) {
+					digits.push_back(word.second);
+				}
+			}
+		}
+
+		auto first = digits.front();
+		auto last  = digits.back();
+
+		sum += (first * 10) + last;
+	}
+	cout << sum << endl;
+}
+
+int
+main()
+{
+	part1();
+	part2();
+}
-- 
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