Add 2023 solutions

src/2023/Day01.cpp

@@ -0,0 +1,95 @@
+#include "common/aoc.h"
+
+namespace y2023::day01
+{
+  REGISTER_DAY(2023, Day01, std::vector<std::string>, int);
+
+  REGISTER_TEST_EXAMPLE(2023, Day01, ExampleInput, 1, 209);
+  REGISTER_TEST(2023, Day01, Input, 1, 54990);
+  REGISTER_TEST_EXAMPLE(2023, Day01, ExampleInput, 2, 281);
+  REGISTER_TEST(2023, Day01, Input, 2, 54473);
+
+  int GetNumberAt(const std::string& str, int pos)
+  {
+    if (str[pos] >= '0' && str[pos] <= '9')
+    {
+      return str[pos] - '0';
+    }
+    else
+    {
+      static const std::vector<std::string> numbers{
+        "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"};
+      for (int num = 0; num < numbers.size(); num++)
+      {
+        if (Helper::StartsWith(std::string_view{&str[pos], str.size() - pos}, numbers[num]))
+        {
+          return num + 1;
+        }
+      }
+    }
+    return -1;
+  }
+
+  READ_INPUT(input)
+  {
+    return Input::ReadLines(input);
+  }
+
+  OUTPUT1(input)
+  {
+    int sum = 0;
+    for (auto& str : input)
+    {
+      int first = 0;
+      int last = 0;
+      for (int i = 0; i < str.size(); i++)
+      {
+        if (Helper::IsDigit(str[i]))
+        {
+          first = str[i] - '0';
+          break;
+        }
+      }
+      for (int i = str.size() - 1; i >= 0; i--)
+      {
+        if (Helper::IsDigit(str[i]))
+        {
+          last = str[i] - '0';
+          break;
+        }
+      }
+      sum += first * 10 + last;
+    }
+    return sum;
+  }
+
+  OUTPUT2(input)
+  {
+    int sum = 0;
+    for (auto& str : input)
+    {
+      int first = -1;
+      int last = -1;
+      for (int i = 0; i < str.size(); i++)
+      {
+        int number = GetNumberAt(str, i);
+        if (number != -1)
+        {
+          first = number;
+          break;
+        }
+      }
+      for (int i = str.size() - 1; i >= 0; i--)
+      {
+        int number = GetNumberAt(str, i);
+        if (number != -1)
+        {
+          last = number;
+          break;
+        }
+      }
+      sum += first * 10 + last;
+    }
+    return sum;
+  }
+}