From 56e890cec0a28c0a485212ccebfaf774235a79a2 Mon Sep 17 00:00:00 2001
From: Thomas Schmucker <ts@its1.de>
Date: Wed, 3 Jan 2024 23:35:54 +0100
Subject: prepare for more puzzles ... :)

---
 src/day09.cpp | 75 -----------------------------------------------------------
 1 file changed, 75 deletions(-)
 delete mode 100644 src/day09.cpp

(limited to 'src/day09.cpp')

diff --git a/src/day09.cpp b/src/day09.cpp
deleted file mode 100644
index 4b30e6e..0000000
--- a/src/day09.cpp
+++ /dev/null
@@ -1,75 +0,0 @@
-#include <fstream>
-#include <iostream>
-#include <sstream>
-#include <string>
-#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;
-}
-
-template<typename T = long>
-vector<T>
-read_ints(const string& line)
-{
-	stringstream iss{ line };
-	return vector<T>{ istream_iterator<T>{ iss }, istream_iterator<T>{} };
-}
-
-template<typename T>
-T
-solve_rec(const vector<T>& values)
-{
-	vector<T> differences;
-
-	for ( size_t idx = 1; idx < values.size(); ++idx ) {
-		differences.emplace_back(values[idx] - values[idx - 1]);
-	}
-	auto all_zeros = all_of(differences.begin(), differences.end(), [](T diff) { return diff == 0; });
-	if ( !all_zeros ) {
-		return solve_rec(differences) + values.back();
-	}
-	else {
-		return values.back();
-	}
-}
-
-void
-part1(const vector<string>& lines)
-{
-	long sum = 0;
-	for ( const auto& line: lines ) {
-		sum += solve_rec(read_ints(line));
-	}
-	cout << sum << endl;
-}
-
-void
-part2(const vector<string>& lines)
-{
-	long sum = 0;
-	for ( const auto& line: lines ) {
-		auto values = read_ints(line);
-		reverse(values.begin(), values.end());
-		sum += solve_rec(values);
-	}
-	cout << sum << endl;
-}
-
-int
-main()
-{
-	auto lines = read_file("data/day09.txt");
-	part1(lines);
-	part2(lines);
-}
-- 
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