Add 2022 solutions

src/2022/Day04.cpp

@@ -0,0 +1,65 @@
+#include "common/aoc.h"
+
+namespace y$1::day04
+{
+  struct Range
+  {
+    int left = 0;
+    int right = 0;
+  };
+
+  struct Pair
+  {
+    Range r1;
+    Range r2;
+  };
+
+  REGISTER_DAY(2022, Day04, std::vector<Pair>, int);
+
+  REGISTER_TEST_EXAMPLE(2022, Day04, ExampleInput, 1, 2);
+  REGISTER_TEST(2022, Day04, Input, 1, 477);
+  REGISTER_TEST_EXAMPLE(2022, Day04, ExampleInput, 2, 4);
+  REGISTER_TEST(2022, Day04, Input, 2, 830);
+
+  READ_INPUT(input)
+  {
+    std::string str;
+    std::vector<Pair> pairs;
+    while (std::getline(input, str))
+    {
+      std::stringstream ss{str};
+      Pair pair;
+      ss >> pair.r1.left >> "-" >> pair.r1.right >> ",";
+      ss >> pair.r2.left >> "-" >> pair.r2.right;
+      pairs.emplace_back(pair);
+    }
+    return pairs;
+  }
+
+  OUTPUT1(input)
+  {
+    int sum = 0;
+    for (auto& pair : input)
+    {
+      if ((pair.r1.left >= pair.r2.left && pair.r1.right <= pair.r2.right) ||
+          (pair.r2.left >= pair.r1.left && pair.r2.right <= pair.r1.right))
+      {
+        sum++;
+      }
+    }
+    return sum;
+  }
+
+  OUTPUT2(input)
+  {
+    int sum = 0;
+    for (auto& pair : input)
+    {
+      if (pair.r1.left <= pair.r2.right && pair.r1.right >= pair.r2.left)
+      {
+        sum++;
+      }
+    }
+    return sum;
+  }
+}