diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..70e34ec
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "C_Cpp.errorSquiggles": "disabled"
+}
\ No newline at end of file
diff --git a/src/alg.cpp b/src/alg.cpp
index 6e34e74..1d98cfd 100644
--- a/src/alg.cpp
+++ b/src/alg.cpp
@@ -1,6 +1,11 @@
 // Copyright 2026 NNTU-CS
 #include <cstdint>
+#include <stdexcept>
 
 uint64_t factorial(uint8_t n) {
-  return 1;
+    uint64_t result = 1;
+    for (uint8_t i = 2; i <= n; ++i) {
+        result *= i;
+    }
+    return result;
 }