diff --git a/modules/14_cpp26/src/pipeline_ranges.cpp b/modules/14_cpp26/src/pipeline_ranges.cpp
index 2fb3686..e2b7f03 100644
--- a/modules/14_cpp26/src/pipeline_ranges.cpp
+++ b/modules/14_cpp26/src/pipeline_ranges.cpp
@@ -1,17 +1,23 @@
 #include "pipeline_ranges.hpp"
 
+#include <map>
+#include <ranges>
+
 namespace cpp26 {
 
-auto top_values_by_category(const std::vector<Record>& records, int min_value)
-    -> std::vector<Record> {
-    (void)records; (void)min_value;
-    return {};
+auto top_values_by_category(const std::vector<Record>& records, const int min_value) -> std::vector<Record> {
+    return records
+        | std::views::filter([min_value](const auto& record) { return record.value > min_value; })
+        | std::ranges::to<std::vector<Record>>();
 }
 
-auto total_by_category(const std::vector<Record>& records)
-    -> std::vector<std::pair<std::string, int>> {
-    (void)records;
-    return {};
+auto total_by_category(const std::vector<Record>& records) -> std::vector<std::pair<std::string, int>> {
+    std::map<std::string, int> grouped;
+    for (const auto&[category, value] : records) {
+        grouped[category] += value;
+    }
+    return grouped
+        | std::ranges::to<std::vector<std::pair<std::string, int>>>();
 }
 
 }  // namespace cpp26