diff --git a/1sem/README.md b/1sem/README.md
index 98d2647..4d3f530 100644
--- a/1sem/README.md
+++ b/1sem/README.md
@@ -11,6 +11,6 @@
 
 > Ремарка:
 > 
-> Все задания были получены и выполнены в 2019/2020 гг.
+> Все задания были получены и выполнены в 2019 г.
 > В дальнейшем задания могут быть изменены
 > Соответственно, код из данного репозитория не будет решением
\ No newline at end of file
diff --git a/1sem/programming basics/z15/43.cpp b/1sem/programming basics/z15/43.cpp
deleted file mode 100644
index 67be14a..0000000
--- a/1sem/programming basics/z15/43.cpp	
+++ /dev/null
@@ -1,28 +0,0 @@
-// pb_z15_43.cpp
-// Горбацевич Андрей
-#include <iostream>
-#include <fstream>
-#include <climits>
-
-using namespace std;
-
-void reverse_uchar(std::iostream &ost);
-
-int main() {
-    fstream iof("out.bin", ios::in|ios::out|ios::binary);
-    if (!iof.is_open())
-    {
-        cerr << "Unable to open file" << endl;
-        return 1;
-    }
-
-    reverse_uchar(iof);
-    return 0;
-}
-
-void reverse_uchar(std::iostream &ost) {
-    unsigned char cval = UCHAR_MAX;
-    for (int i = 0; i <= cval; i++) {
-        ost << cval--;
-    }
-}
diff --git a/1sem/programming basics/z15/44.cpp b/1sem/programming basics/z15/44.cpp
deleted file mode 100644
index 12be17d..0000000
--- a/1sem/programming basics/z15/44.cpp	
+++ /dev/null
@@ -1,30 +0,0 @@
-// pb_z15_44.cpp
-// Горбацевич Андрей
-#include <iostream>
-#include <fstream>
-
-using namespace std;
-
-void uchar_add(std::iostream &ost, unsigned char v);
-
-int main() {
-    fstream iof("out.bin", ios::in|ios::out|ios::binary);
-    if (!iof.is_open())
-    {
-        cerr << "Unable to open file" << endl;
-        return 1;
-    }
-
-    unsigned char v;
-    cout << "Char >>>";
-    cin >> v;
-    uchar_add(iof, v);
-    return 0;
-}
-
-void uchar_add(std::iostream &ost, unsigned char v) {
-    while (!ost.eof() && ost.good()) {
-        unsigned int out = (unsigned char)ost.get() + v;
-        ost << (unsigned char)(out > 255? char(255) : char(out));
-    }
-}
diff --git a/1sem/programming basics/z15/45.cpp b/1sem/programming basics/z15/45.cpp
deleted file mode 100644
index e69de29..0000000