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/day15.cpp | 102 ----------------------------------------------------------
 1 file changed, 102 deletions(-)
 delete mode 100644 src/day15.cpp

(limited to 'src/day15.cpp')

diff --git a/src/day15.cpp b/src/day15.cpp
deleted file mode 100644
index 6fcbfc2..0000000
--- a/src/day15.cpp
+++ /dev/null
@@ -1,102 +0,0 @@
-#include <algorithm>
-#include <fstream>
-#include <iostream>
-#include <list>
-#include <numeric>
-#include <sstream>
-#include <string>
-#include <vector>
-using namespace std;
-
-string
-read_file(string_view filename)
-{
-	fstream input{ filename };
-	return { istreambuf_iterator<char>{ input }, istreambuf_iterator<char>{} };
-}
-
-void
-rtrim(string& str)
-{
-	str.erase(find_if(str.rbegin(), str.rend(), [](auto chr) { return !isspace(chr); }).base(), str.end());
-}
-
-vector<string>
-split(const string& line, char sep)
-{
-	vector<string> parts{};
-	stringstream   input{ line };
-
-	for ( string part; getline(input, part, sep); ) {
-		rtrim(part);
-		parts.emplace_back(part);
-	}
-
-	return parts;
-}
-
-unsigned int
-calculate_hash(string_view str)
-{
-	unsigned int value = 0;
-	for ( auto chr: str ) {
-		value += static_cast<unsigned char>(chr);
-		value *= 17;
-	}
-	return value % 256;
-}
-
-void
-part1()
-{
-	const auto parts = split(read_file("data/day15.txt"), ',');
-	cout << accumulate(parts.begin(), parts.end(), 0UL, [](auto init, const auto& str) { return init + calculate_hash(str); }) << endl;
-}
-
-void
-part2()
-{
-	vector<list<tuple<string, long>>> boxes(256);
-
-	const auto line  = read_file("data/day15.txt");
-	const auto parts = split(line, ',');
-	for ( const auto& part: parts ) {
-		const auto pos  = part.find_first_of("=-");
-		const auto lens = part.substr(0, pos);
-		auto&      box  = boxes[calculate_hash(lens)];
-
-		if ( part[pos] == '=' ) {
-			const auto value = stol(part.substr(pos + 1));
-
-			auto iter = find_if(box.begin(), box.end(), [&lens](const auto& element) { return get<0>(element) == lens; });
-			if ( iter == box.end() ) {
-				box.emplace_back(lens, value);
-			}
-			else {
-				get<1>(*iter) = value;
-			}
-		}
-		else {
-			box.remove_if([&lens](const auto& element) { return get<0>(element) == lens; });
-		}
-	}
-
-	long value = 0;
-	for ( size_t idx = 0; idx != boxes.size(); ++idx ) {
-		const auto& box = boxes[idx];
-
-		long lens_number = 1;
-		for ( const auto& lens: box ) {
-			value += static_cast<long>(idx + 1) * lens_number * get<1>(lens);
-			++lens_number;
-		}
-	}
-	cout << value << endl;
-}
-
-int
-main()
-{
-	part1();
-	part2();
-}
-- 
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