Day 1

CMakeLists.txt

@@ -9,3 +9,4 @@ if( NOT CMAKE_BUILD_TYPE )
    SET( CMAKE_BUILD_TYPE Release )
 endif()
 
+add_executable(d1 "d1/main.cxx") 

d1/main.cxx

@@ -0,0 +1,39 @@
+#include <iostream>
+#include <fstream>
+#include <sstream>
+#include <string>
+#include <queue>
+
+int main()
+{
+  std::ifstream file{"../d1/input.txt"};
+  std::priority_queue<int> calories{};
+
+  std::uint32_t tot{0}, cur{0}, n;
+  std::string line;
+  while (std::getline(file, line))
+  {
+    std::stringstream iss(line);
+    if (line.length())
+    {
+      iss >> n;
+      cur += n;
+    }
+    else
+    {
+      calories.emplace(cur);
+      cur = 0;
+    }
+  }
+  tot = calories.top();
+
+  for (std::uint32_t i{0}; i < 2; i++)
+  {
+    calories.pop();
+    tot += calories.top();
+  }
+
+  std::cout << tot << std::endl;
+
+  return 0;
+}