diff --git a/modules/08_stl_algorithms/src/iterators.cpp b/modules/08_stl_algorithms/src/iterators.cpp
index 551a220..54a0111 100644
--- a/modules/08_stl_algorithms/src/iterators.cpp
+++ b/modules/08_stl_algorithms/src/iterators.cpp
@@ -1,9 +1,28 @@
 #include "iterators.hpp"
 
+#include <algorithm>
+#include <ranges>
+
 namespace stl_algorithms {
 
-auto reverse_copy(const std::vector<int>& data) -> std::vector<int> { (void)data; return {}; }
-auto countGreaterThan(const std::vector<int>& data, int threshold) -> int { (void)data; (void)threshold; return 0; }
-auto everyEven(const std::vector<int>& data) -> bool { (void)data; return false; }
+auto reverse_copy(const std::vector<int>& data) -> std::vector<int> {
+    std::vector<int> result;
+    for (const auto& element : data | std::views::reverse) {
+        result.push_back(element);
+    }
+    return result;
+}
+
+auto countGreaterThan(const std::vector<int>& data, const int threshold) -> int {
+    auto count = 0;
+    for (const auto& element : data) {
+        if (element > threshold) count++;
+    }
+    return count;
+}
+
+auto everyEven(const std::vector<int>& data) -> bool {
+    return std::ranges::all_of(data, [](const int x) { return x % 2 == 0; });
+}
 
 }  // namespace stl_algorithms