diff --git a/main.cpp b/main.cpp
index f4bd2c6..6303cef 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,5 +1,5 @@
 #include <stdio.h>
-
+// main file-executor
 int main() {
     printf("Hello World!\n");
     return 0;
diff --git a/simplex.cpp b/simplex.cpp
index c074bb7..70be5cc 100644
--- a/simplex.cpp
+++ b/simplex.cpp
@@ -1,3 +1 @@
-//
-// Created by emil on 17.09.2024.
-//
+// implementation of simplex task
\ No newline at end of file
diff --git a/tools/matrix.cpp b/tools/matrix.cpp
new file mode 100644
index 0000000..17d3381
--- /dev/null
+++ b/tools/matrix.cpp
@@ -0,0 +1 @@
+// some functions for matrix interaction
\ No newline at end of file