diff --git a/.gitignore b/.gitignore
index ea8c4bf..f979fa7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 /target
+**/.DS_Store
diff --git a/.gitmodules b/.gitmodules
index a1f8734..d302d01 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -3,7 +3,7 @@
 	url = https://github.com/wawahejun/learning-lm-rs
 [submodule "exercises/rustlings"]
 	path = exercises/rustlings
-	url = https://github.com/wawahejun/rustlings-completed-version
+	url = https://github.com/Desjajja/rustlings-backup.git
 [submodule "exercises/learning-cxx"]
 	path = exercises/learning-cxx
 	url = https://github.com/wawahejun/learning-cxx
diff --git a/course/.DS_Store b/course/.DS_Store
new file mode 100644
index 0000000..9a874b5
Binary files /dev/null and b/course/.DS_Store differ
diff --git a/eval_result.json b/eval_result.json
index 57f77f5..2c3074b 100644
--- a/eval_result.json
+++ b/eval_result.json
@@ -1,18 +1,386 @@
 {
   "exercises": [
     {
-      "name": "model.rs",
+      "name": "options1.rs",
       "result": true
     },
     {
-      "name": "operators.rs",
+      "name": "options2.rs",
+      "result": true
+    },
+    {
+      "name": "options3.rs",
+      "result": true
+    },
+    {
+      "name": "functions3.rs",
+      "result": true
+    },
+    {
+      "name": "functions2.rs",
+      "result": true
+    },
+    {
+      "name": "functions1.rs",
+      "result": true
+    },
+    {
+      "name": "functions5.rs",
+      "result": true
+    },
+    {
+      "name": "functions4.rs",
+      "result": true
+    },
+    {
+      "name": "macros3.rs",
+      "result": true
+    },
+    {
+      "name": "macros2.rs",
+      "result": true
+    },
+    {
+      "name": "macros1.rs",
+      "result": true
+    },
+    {
+      "name": "macros4.rs",
+      "result": true
+    },
+    {
+      "name": "arc1.rs",
+      "result": true
+    },
+    {
+      "name": "box1.rs",
+      "result": true
+    },
+    {
+      "name": "cow1.rs",
+      "result": true
+    },
+    {
+      "name": "rc1.rs",
+      "result": true
+    },
+    {
+      "name": "if1.rs",
+      "result": true
+    },
+    {
+      "name": "if3.rs",
+      "result": true
+    },
+    {
+      "name": "if2.rs",
+      "result": true
+    },
+    {
+      "name": "threads2.rs",
+      "result": true
+    },
+    {
+      "name": "threads3.rs",
+      "result": false
+    },
+    {
+      "name": "threads1.rs",
+      "result": true
+    },
+    {
+      "name": "generics2.rs",
+      "result": true
+    },
+    {
+      "name": "generics1.rs",
+      "result": true
+    },
+    {
+      "name": "move_semantics3.rs",
+      "result": true
+    },
+    {
+      "name": "move_semantics2.rs",
+      "result": true
+    },
+    {
+      "name": "move_semantics5.rs",
+      "result": true
+    },
+    {
+      "name": "move_semantics1.rs",
+      "result": true
+    },
+    {
+      "name": "move_semantics4.rs",
+      "result": true
+    },
+    {
+      "name": "strings1.rs",
+      "result": true
+    },
+    {
+      "name": "strings4.rs",
+      "result": true
+    },
+    {
+      "name": "strings3.rs",
+      "result": true
+    },
+    {
+      "name": "strings2.rs",
+      "result": true
+    },
+    {
+      "name": "vecs2.rs",
+      "result": true
+    },
+    {
+      "name": "vecs1.rs",
+      "result": true
+    },
+    {
+      "name": "as_ref_mut.rs",
+      "result": true
+    },
+    {
+      "name": "try_from_into.rs",
+      "result": true
+    },
+    {
+      "name": "from_str.rs",
+      "result": true
+    },
+    {
+      "name": "using_as.rs",
+      "result": true
+    },
+    {
+      "name": "from_into.rs",
+      "result": true
+    },
+    {
+      "name": "structs3.rs",
+      "result": true
+    },
+    {
+      "name": "structs2.rs",
+      "result": true
+    },
+    {
+      "name": "structs1.rs",
+      "result": true
+    },
+    {
+      "name": "intro2.rs",
+      "result": true
+    },
+    {
+      "name": "intro1.rs",
+      "result": true
+    },
+    {
+      "name": "clippy1.rs",
+      "result": true
+    },
+    {
+      "name": "clippy3.rs",
+      "result": true
+    },
+    {
+      "name": "clippy2.rs",
+      "result": true
+    },
+    {
+      "name": "iterators2.rs",
+      "result": true
+    },
+    {
+      "name": "iterators3.rs",
+      "result": false
+    },
+    {
+      "name": "iterators4.rs",
+      "result": true
+    },
+    {
+      "name": "iterators5.rs",
+      "result": true
+    },
+    {
+      "name": "iterators1.rs",
+      "result": true
+    },
+    {
+      "name": "traits3.rs",
+      "result": true
+    },
+    {
+      "name": "traits2.rs",
+      "result": true
+    },
+    {
+      "name": "traits1.rs",
+      "result": true
+    },
+    {
+      "name": "traits5.rs",
+      "result": true
+    },
+    {
+      "name": "traits4.rs",
+      "result": true
+    },
+    {
+      "name": "modules1.rs",
+      "result": true
+    },
+    {
+      "name": "modules2.rs",
+      "result": true
+    },
+    {
+      "name": "modules3.rs",
+      "result": true
+    },
+    {
+      "name": "variables2.rs",
+      "result": true
+    },
+    {
+      "name": "variables6.rs",
+      "result": true
+    },
+    {
+      "name": "variables3.rs",
+      "result": true
+    },
+    {
+      "name": "variables4.rs",
+      "result": true
+    },
+    {
+      "name": "variables1.rs",
+      "result": true
+    },
+    {
+      "name": "variables5.rs",
+      "result": true
+    },
+    {
+      "name": "hashmaps1.rs",
+      "result": true
+    },
+    {
+      "name": "hashmaps3.rs",
+      "result": true
+    },
+    {
+      "name": "hashmaps2.rs",
+      "result": false
+    },
+    {
+      "name": "lifetimes1.rs",
+      "result": true
+    },
+    {
+      "name": "lifetimes3.rs",
+      "result": true
+    },
+    {
+      "name": "lifetimes2.rs",
+      "result": true
+    },
+    {
+      "name": "enums3.rs",
+      "result": true
+    },
+    {
+      "name": "enums2.rs",
+      "result": true
+    },
+    {
+      "name": "enums1.rs",
+      "result": true
+    },
+    {
+      "name": "quiz1.rs",
+      "result": true
+    },
+    {
+      "name": "quiz2.rs",
+      "result": true
+    },
+    {
+      "name": "quiz3.rs",
+      "result": true
+    },
+    {
+      "name": "errors3.rs",
+      "result": true
+    },
+    {
+      "name": "errors2.rs",
+      "result": true
+    },
+    {
+      "name": "errors6.rs",
+      "result": true
+    },
+    {
+      "name": "errors1.rs",
+      "result": true
+    },
+    {
+      "name": "errors5.rs",
+      "result": true
+    },
+    {
+      "name": "errors4.rs",
+      "result": true
+    },
+    {
+      "name": "tests2.rs",
+      "result": true
+    },
+    {
+      "name": "tests3.rs",
+      "result": true
+    },
+    {
+      "name": "tests1.rs",
+      "result": true
+    },
+    {
+      "name": "primitive_types3.rs",
+      "result": true
+    },
+    {
+      "name": "primitive_types2.rs",
+      "result": true
+    },
+    {
+      "name": "primitive_types6.rs",
+      "result": true
+    },
+    {
+      "name": "primitive_types1.rs",
+      "result": true
+    },
+    {
+      "name": "primitive_types5.rs",
+      "result": true
+    },
+    {
+      "name": "primitive_types4.rs",
       "result": true
     }
   ],
   "statistics": {
-    "total_exercations": 2,
-    "total_succeeds": 2,
-    "total_failures": 0,
-    "total_time": 30
+    "total_exercations": 94,
+    "total_succeeds": 91,
+    "total_failures": 3,
+    "total_time": 20
   }
 }
\ No newline at end of file
diff --git a/exercises/.DS_Store b/exercises/.DS_Store
new file mode 100644
index 0000000..3270e36
Binary files /dev/null and b/exercises/.DS_Store differ
diff --git a/exercises/rustlings b/exercises/rustlings
new file mode 160000
index 0000000..bd0b892
--- /dev/null
+++ b/exercises/rustlings
@@ -0,0 +1 @@
+Subproject commit bd0b892ae54b0fcc23cc5cd7ada4610a005f67ce
diff --git a/xtask/.DS_Store b/xtask/.DS_Store
new file mode 100644
index 0000000..feca861
Binary files /dev/null and b/xtask/.DS_Store differ