diff --git a/README.md b/README.md
index 87de18a..4872ba2 100644
--- a/README.md
+++ b/README.md
@@ -88,12 +88,13 @@ $ git commit -m 'code: заготовка программы'
 $ git add project.cbp
 warning: in the working copy of 'project.cbp', LF will be replaced by CRLF the n
 ext time Git touches it
-
+11. Выполним коммит с файлом main.cpp и темой build: 
 Мария@Note-Mary MINGW64 ~/Desktop/lab02/alice/project (master)
 $ git commit -m 'build'
 [master d2cf070] build
  1 file changed, 40 insertions(+)
  create mode 100644 project.cbp
+12. Посмотрим состояние рабочей копии
 
 Мария@Note-Mary MINGW64 ~/Desktop/lab02/alice/project (master)
 $ git status
@@ -108,3 +109,167 @@ Untracked files:
         project.layout
 
 no changes added to commit (use "git add" and/or "git commit -a")
+
+ 13. Заменим тело функции main() на ввод двух чисел:
+
+cout << "Enter A and B: ";
+int a, b;
+cin >> a >> b;
+
+Мария@Note-Mary MINGW64 ~/Desktop/lab02/alice/project (master)
+$ git status
+On branch master
+Changes not staged for commit:
+  (use "git add <file>..." to update what will be committed)
+  (use "git restore <file>..." to discard changes in working directory)
+        modified:   main.cpp
+
+Untracked files:
+  (use "git add <file>..." to include in what will be committed)
+        project.layout
+        bin/
+        obj/
+
+Мария@Note-Mary MINGW64 ~/Desktop/lab02/alice/project (master)
+$ git add main.cpp
+
+Мария@Note-Mary MINGW64 ~/Desktop/lab02/alice/project (master)
+$ git commit -m "added search for the sum of numbers"
+[master 3c32ed0] added search for the sum of numbers
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+ Мария@Note-Mary MINGW64 ~/Desktop/lab02/alice/project (master)
+$ git commit -a -m "added search for the sum and dif"
+[master 3b4f949] added search for the sum and dif
+ 1 file changed, 2 insertions(+)
+15. Укажем Git игнорировать присутствие каталога bin. Для этого создадим в CodeBlocks новый файл (File → New... → Empty) и запишем в него строку:
+
+/bin
+добавим новый файл в индекс
+Мария@Note-Mary MINGW64 ~/Desktop/lab02/alice/project (master)
+$ git add .gitignore
+
+Мария@Note-Mary MINGW64 ~/Desktop/lab02/alice/project (master)
+$ git commit -m "git"
+[master 3fa2b6a] git
+ 1 file changed, 2 insertions(+)
+ create mode 100644 .gitignore
+
+Мария@Note-Mary MINGW64 ~/Desktop/lab02/alice/project (master)
+$ git status
+On branch master
+Untracked files:
+  (use "git add <file>..." to include in what will be committed)
+        project.depend
+        project.layout
+
+nothing added to commit but untracked files present (use "git add" to track)
+16. Просмотр истории
+Мария@Note-Mary MINGW64 ~/Desktop/lab02/alice/project (master)
+$ git log --stat
+commit 3fa2b6a62dab4509956db6d66b1071240733f214 (HEAD -> master)
+Author: Alice (KarelinaMK) <KarelinaMK@mpei.ru>
+Date:   Mon Mar 6 15:10:17 2023 +0300
+
+    git
+
+ .gitignore | 2 ++
+ 1 file changed, 2 insertions(+)
+
+commit 3b4f9498587d54632d066d3d585eb1364cd464ef
+Author: Alice (KarelinaMK) <KarelinaMK@mpei.ru>
+Date:   Mon Mar 6 14:49:50 2023 +0300
+
+    added search for the sum of numbers
+
+ main.cpp | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+commit d2cf070b25b6b9568b8a746ba6f8451ed3d2e045
+Author: Alice (KarelinaMK) <KarelinaMK@mpei.ru>
+Date:   Mon Mar 6 14:27:02 2023 +0300
+
+    build
+
+ project.cbp | 40 ++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 40 insertions(+)
+
+commit f3f527116c9e0798e9f6169012fc9ef339e5427f
+Author: Alice (KarelinaMK) <KarelinaMK@mpei.ru>
+Date:   Mon Mar 6 14:18:52 2023 +0300
+
+    code: заготовка программы
+
+ main.cpp | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+ 17. просмотр коммитов
+ Мария@Note-Mary MINGW64 ~/Desktop/lab02/alice/project (master)
+$ git show HEAD~1
+commit 3b4f9498587d54632d066d3d585eb1364cd464ef
+Author: Alice (KarelinaMK) <KarelinaMK@mpei.ru>
+Date:   Mon Mar 6 14:49:50 2023 +0300
+
+    added search for the sum and dif
+
+diff --git a/main.cpp b/main.cpp
+index 04c77d9..6f78dbd 100644
+--- a/main.cpp
++++ b/main.cpp
+@@ -7,5 +7,7 @@ int main()
+   cout << "Enter A and B: ";
+ int a, b;
+ cin >> a >> b;
++cout << "A + B = " << a + b << '\n'
++     << "A - B = " << a - b << '\n';
+
+ }
+ 18. Просмотр изменений
+ Мария@Note-Mary MINGW64 ~/Desktop/lab02/alice/project (master)
+$ git diff
+diff --git a/main.cpp b/main.cpp // разница между алисой и бобом
+index 6f78dbd..cc11ab1 100644 // хэш файла
+--- a/main.cpp
++++ b/main.cpp
+@@ -8,6 +8,7 @@ int main()
+ int a, b;
+ cin >> a >> b;
+ cout << "A + B = " << a + b << '\n'
+-     << "A - B = " << a - b << '\n';// ушло
++     << "A - B = " << a - b << '\n'// добавилось
++     << "A * B = " << a * b << '\n';
+
+ }
+
+Просмотрим историю всех веток
+Мария@Note-Mary MINGW64 ~/Desktop/lab02/alice/project (master)
+$  git log --oneline --decorate --all 
+
+
+* 6b0ae13 (HEAD, master) min bob
+
+eeb2598 (origin/master, origin/HEAD) max al
+
+da439d7 del al
+261c99c mult bob
+992780d first commit
+3fa2b6a git
+3b4f949 added search for the sum and dif
+3c32ed0 added search for the sum of numbers
+d2cf070 build
+f3f5271 code: заготовка программы
+20. Синхронизируйте ветку main «на машине Алисы» с сервером. Просмотрите историю всех веток и занесите результат в отчет.
+Мария@Note-Mary MINGW64 ~/Desktop/lab02/alice/project (main|MERGING)
+$ git log --oneline --decorate --all
+1b91802 (double) double
+6b0ae13 (origin/main, origin/HEAD) min bob
+eeb2598 (HEAD -> main) max al
+da439d7 del al
+261c99c mult bob
+992780d first commit
+3fa2b6a git
+3b4f949 added search for the sum and dif
+3c32ed0 added search for the sum of numbers
+d2cf070 build
+f3f5271 code: заготовка программы
+
+