diff --git a/modules/02_control_flow/src/break_continue.cpp b/modules/02_control_flow/src/break_continue.cpp
index 1ed870f..cd88296 100644
--- a/modules/02_control_flow/src/break_continue.cpp
+++ b/modules/02_control_flow/src/break_continue.cpp
@@ -3,18 +3,27 @@
 namespace control_flow {
 
 auto sum_positive(const std::vector<int>& data) -> int {
-    (void)data;
-    return 0;
+    auto sum = 0;
+    for (const auto i : data) {
+        if (i > 0) sum += i;
+    }
+    return sum;
 }
 
-auto first_multiple_of(const std::vector<int>& data, int divisor) -> int {
-    (void)data; (void)divisor;
+auto first_multiple_of(const std::vector<int>& data, const int divisor) -> int {
+    for (const auto i : data) {
+        if (i > divisor && i % divisor == 0) return i;
+    }
     return -1;
 }
 
 auto collect_until_negative(const std::vector<int>& data) -> std::vector<int> {
-    (void)data;
-    return {};
+    std::vector<int> result;
+    for (const auto i : data) {
+        if (i < 0) break;
+        result.push_back(i);
+    }
+    return result;
 }
 
 }  // namespace control_flow