commit 4ea258eb1f9e1bdbae7c3172bcb124ebd7b3b443
Author: Hugo Mårdbrink <hugo@mardbrink.se>
Date:   Fri Dec 1 13:46:02 2023 +0100

    Day 1

diff --git a/.clang-tidy b/.clang-tidy
new file mode 100644
index 0000000..03d7bf1
--- /dev/null
+++ b/.clang-tidy
@@ -0,0 +1,28 @@
+Checks: "-*,clang-analyzer-*"
+ColumnLimit: 120
+HeaderFilterRegex: ".*"
+FormatStyle: file
+DeriveLineEnding: false
+IndentWidth: 2
+TabWidth: 2
+UseTab: Always
+SpacesBeforeTrailingComments: 1
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+SpacesInAngles: false
+BreakBeforeBraces: Allman
+BraceWrapping:
+  AfterClass: true
+  AfterControlStatement: true
+  AfterEnum: true
+  AfterFunction: true
+  AfterNamespace: true
+  AfterStruct: true
+  AfterUnion: true
+  BeforeCatch: true
+  BeforeElse: true
+  IndentBraces: false
+  SplitEmptyFunction: true
+  SplitEmptyRecord: true
+  SplitEmptyNamespace: true
+  AfterLambda: true
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..7f7adc5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/build
+/.vscode
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..97f03ec
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,19 @@
+cmake_minimum_required(VERSION 3.21)
+project(aoc23 LANGUAGES CXX)
+
+set(CMAKE_CXX_STANDARD 23)
+
+set(CMAKE_BINARY_DIR ${CMAKE_SOURCE_DIR}/build)
+set(EXECUTABLE_OUTPUT_PATH ${CMAKE_BINARY_DIR})
+
+set(executables d1)
+
+foreach(executable ${executables})
+    add_executable(${executable} "${executable}/main.cxx")
+endforeach()
+
+set(CMAKE_CXX_CLANG_TIDY
+    clang-tidy;
+    -checks=*;
+    -header-filter=.*;
+)
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..8c4e7ce
--- /dev/null
+++ b/README.md
@@ -0,0 +1,10 @@
+# AOC23
+
+In c++
+
+```bash
+mkdir build
+cd build
+cmake ..
+make
+```
diff --git a/d1/input.txt b/d1/input.txt
new file mode 100644
index 0000000..36374dd
--- /dev/null
+++ b/d1/input.txt
@@ -0,0 +1,1000 @@
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\ No newline at end of file
diff --git a/d1/main.cxx b/d1/main.cxx
new file mode 100644
index 0000000..6296ea5
--- /dev/null
+++ b/d1/main.cxx
@@ -0,0 +1,52 @@
+#include <numeric>
+#include <algorithm>
+#include <unordered_map>
+#include <map>
+#include <iostream>
+#include <fstream>
+#include <sstream>
+#include <string>
+#include <vector>
+
+int main()
+{
+  std::ifstream file{"../d1/input.txt"};
+  std::string line, value;
+  std::vector<int> numbers;
+  std::unordered_map<std::string, char> letterMap{{"one", '1'},
+                                                  {"two", '2'},
+                                                  {"three", '3'},
+                                                  {"four", '4'},
+                                                  {"five", '5'},
+                                                  {"six", '6'},
+                                                  {"seven", '7'},
+                                                  {"eight", '8'},
+                                                  {"nine", '9'}};
+
+  while (std::getline(file, line))
+  {
+    std::map<int, char> lineNumbers;
+    for (const auto &entry : letterMap)
+    {
+      auto pos = line.find(entry.first);
+      while (pos != std::string::npos)
+      {
+        lineNumbers[pos] = entry.second;
+        pos = line.find(entry.first, pos + 1);
+      }
+    }
+    auto fstItr = std::find_if(line.begin(), line.end(), [](char c)
+                               { return isdigit(c); });
+    auto sndItr = std::find_if(line.rbegin(), line.rend(), [](char c)
+                               { return isdigit(c); });
+    if (fstItr != line.end())
+    {
+      lineNumbers[std::distance(line.begin(), fstItr)] = *fstItr;
+      lineNumbers[std::distance(line.rbegin(), sndItr)] = *sndItr;
+    }
+    numbers.emplace_back(std::stoi(std::string(1, lineNumbers.begin()->second) + lineNumbers.rbegin()->second));
+  }
+  std::cout << std::accumulate(numbers.begin(), numbers.end(), 0) << std::endl;
+
+  return 0;
+}