Add solution for 2025 Day 6

res/2025/day06/test_input.txt

@@ -0,0 +1,4 @@
+123 328  51 64 
+ 45 64  387 23 
+  6 98  215 314
+*   +   *   +  

src/2025/Day06.cpp

@@ -2,35 +2,109 @@
 
 namespace y2025::day06
 {
-  using InputType = std::vector<int>;
+  struct Table
-  REGISTER_DAY(2025, Day06, InputType, int);
+  {
+    std::vector<std::string> lines;
+    std::vector<char> operators;
+  };
 
-  REGISTER_TEST_EXAMPLE(2025, Day06, ExampleInput, 1, 0);
+  using InputType = Table;
-  REGISTER_TEST(2025, Day06, Input, 1, 0);
+  REGISTER_DAY(2025, Day06, InputType, int64_t);
-  REGISTER_TEST_EXAMPLE(2025, Day06, ExampleInput, 2, 0);
+
-  REGISTER_TEST(2025, Day06, Input, 2, 0);
+  REGISTER_TEST_EXAMPLE(2025, Day06, ExampleInput, 1, 4277556);
+  REGISTER_TEST(2025, Day06, Input, 1, 6343365546996);
+  REGISTER_TEST_EXAMPLE(2025, Day06, ExampleInput, 2, 3263827);
+  REGISTER_TEST(2025, Day06, Input, 2, 11136895955912);
 
   READ_INPUT(input)
   {
-    std::vector<int> vec;
+    Table table;
     std::string str;
     while (std::getline(input, str))
+    {
+      if (str[0] == '*' || str[0] == '+')
       {
         std::stringstream ss{str};
-      int n;
+        char c;
-      ss >> n;
+        while (ss >> c)
-      vec.emplace_back(n);
+        {
+          table.operators.emplace_back(c);
         }
-    return vec;
+      }
+      else
+        table.lines.emplace_back(str);
+    }
+    return table;
+  }
+
+  int64_t Calculate(const std::vector<std::vector<int64_t>>& numbers, const std::vector<char>& operators)
+  {
+    int64_t sum = 0;
+    for (int i = 0; i < numbers.size(); i++)
+    {
+      int64_t total = numbers[i][0];
+      for (int j = 1; j < numbers[i].size(); j++)
+      {
+        if (operators[i] == '+')
+          total += numbers[i][j];
+        else if (operators[i] == '*')
+          total *= numbers[i][j];
+      }
+      sum += total;
+    }
+    return sum;
+  }
+
+  bool EmptyColumn(const std::vector<std::string>& lines, int col)
+  {
+    for (int row = 0; row < lines.size(); row++)
+    {
+      if (lines[row][col] != ' ')
+        return false;
+    }
+    return true;
   }
 
   OUTPUT1(input)
   {
-    return 0;
+    std::vector<std::vector<int64_t>> numbers;
+    numbers.resize(input.operators.size());
+    for (int i = 0; i < input.lines.size(); i++)
+    {
+      std::stringstream ss{input.lines[i]};
+      int n;
+      int col = 0;
+      while (ss >> n)
+      {
+        numbers[col].emplace_back(n);
+        col++;
+      }
+    }
+    return Calculate(numbers, input.operators);
   }
 
   OUTPUT2(input)
   {
-    return 0;
+    std::vector<std::vector<int64_t>> numbers;
+    numbers.emplace_back();
+    for (int col = 0; col < input.lines.front().size(); col++)
+    {
+      if (EmptyColumn(input.lines, col))
+      {
+        numbers.emplace_back();
+        continue;
+      }
+
+      int number = 0;
+      for (int row = 0; row < input.lines.size(); row++)
+      {
+        if (input.lines[row][col] != ' ')
+        {
+          number = number * 10 + input.lines[row][col] - '0';
+        }
+      }
+      numbers.back().emplace_back(number);
+    }
+    return Calculate(numbers, input.operators);
   }
 }