D2P2 done

src/day-2-solution.cpp

@@ -65,6 +65,34 @@ uint_fast64_t solution_part_one(std::vector<std::pair<uint_fast64_t, uint_fast64
   return running_sum;
 }
 
+uint_fast64_t solution_part_two(std::vector<std::pair<uint_fast64_t, uint_fast64_t>> ranges ){
+  uint_fast64_t running_sum = uint_fast64_t{0};
+  for (std::vector<std::pair<uint_fast64_t, uint_fast64_t>>::const_iterator i =ranges.cbegin(); i<ranges.cend(); i++) {
+    spdlog::debug("range: {} to {}", i->first, i->second); 
+    for (uint_fast64_t j = i->first; j<= i->second; j++) {
+      std::string number = fmt::format("{}",j);
+      for (uint_fast64_t pieces = {2}; pieces<=number.size(); pieces++) {
+        if(number.size()%pieces !=0) continue;
+        size_t substring_length = static_cast<size_t>(number.size()/pieces);
+        std::string_view first_piece = std::string_view{&*number.cbegin(), static_cast<size_t>(substring_length)};
+        std::string::const_iterator start = number.cbegin();
+        bool invalid = {true};
+        for (uint_fast64_t shift = static_cast<uint_fast64_t>(substring_length); shift+substring_length<=number.size(); shift+=substring_length) {
+          
+          std::string_view current = std::string_view{&*(start+static_cast<long>(shift)),substring_length};
+          if(current!=first_piece){
+            invalid = {false}; break;
+          }
+          }
+        if(!invalid)continue;
+        running_sum+=j;
+        break;
+      }
+    }
+  }
+  return running_sum;
+}
+
 
 int main (int argc, char *argv[]) {
   spdlog::set_level(spdlog::level::level_enum::debug);
@@ -85,6 +113,7 @@ int main (int argc, char *argv[]) {
   uint_fast64_t first_part_response = solution_part_one(ranges);
   spdlog::info("Solution to part one: {}", first_part_response);
 
-
+  uint_fast64_t second_part_response = solution_part_two(ranges);
+  spdlog::info("Solution to part two: {}", second_part_response);
   return 0;
 }