diff --git a/bin/App.class b/bin/App.class
deleted file mode 100644
index a228130..0000000
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diff --git a/bin/C09_Ensembles/C091_Les_collections/App.class b/bin/C09_Ensembles/C091_Les_collections/App.class
new file mode 100644
index 0000000..0af3700
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diff --git a/bin/C09_Ensembles/C092_Les_vecteurs/App.class b/bin/C09_Ensembles/C092_Les_vecteurs/App.class
new file mode 100644
index 0000000..d15ef65
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diff --git a/bin/C09_Ensembles/C093_Listes_chainees/App.class b/bin/C09_Ensembles/C093_Listes_chainees/App.class
new file mode 100644
index 0000000..7887187
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diff --git a/bin/C10_Tri_et_complexite/C101_Algorithmes/App.class b/bin/C10_Tri_et_complexite/C101_Algorithmes/App.class
new file mode 100644
index 0000000..3c64579
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diff --git a/bin/C10_Tri_et_complexite/C102_Complexite_algorithmique/App.class b/bin/C10_Tri_et_complexite/C102_Complexite_algorithmique/App.class
new file mode 100644
index 0000000..0413131
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diff --git a/bin/C10_Tri_et_complexite/C103_Algorithme_de_tri/App.class b/bin/C10_Tri_et_complexite/C103_Algorithme_de_tri/App.class
new file mode 100644
index 0000000..628ab43
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diff --git a/src/C09_Ensembles/C091_Les_collections/App.java b/src/C09_Ensembles/C091_Les_collections/App.java
new file mode 100644
index 0000000..60e7aa4
--- /dev/null
+++ b/src/C09_Ensembles/C091_Les_collections/App.java
@@ -0,0 +1,7 @@
+package C09_Ensembles.C091_Les_collections;
+
+public class App {
+    public static void main(String[] args) throws Exception {
+        System.out.println("Hello, World!");
+    }
+}
diff --git a/src/App.java b/src/C09_Ensembles/C092_Les_vecteurs/App.java
similarity index 76%
rename from src/App.java
rename to src/C09_Ensembles/C092_Les_vecteurs/App.java
index 0a839f9..aeb9411 100644
--- a/src/App.java
+++ b/src/C09_Ensembles/C092_Les_vecteurs/App.java
@@ -1,3 +1,5 @@
+package C09_Ensembles.C092_Les_vecteurs;
+
 public class App {
     public static void main(String[] args) throws Exception {
         System.out.println("Hello, World!");
diff --git a/src/C09_Ensembles/C093_Listes_chainees/App.java b/src/C09_Ensembles/C093_Listes_chainees/App.java
new file mode 100644
index 0000000..ff3ee08
--- /dev/null
+++ b/src/C09_Ensembles/C093_Listes_chainees/App.java
@@ -0,0 +1,7 @@
+package C09_Ensembles.C093_Listes_chainees;
+
+public class App {
+    public static void main(String[] args) throws Exception {
+        System.out.println("Hello, World!");
+    }
+}
diff --git a/src/C10_Tri_et_complexite/C101_Algorithmes/App.java b/src/C10_Tri_et_complexite/C101_Algorithmes/App.java
new file mode 100644
index 0000000..f808f9d
--- /dev/null
+++ b/src/C10_Tri_et_complexite/C101_Algorithmes/App.java
@@ -0,0 +1,7 @@
+package C10_Tri_et_complexite.C101_Algorithmes;
+
+public class App {
+    public static void main(String[] args) throws Exception {
+        System.out.println("Hello, World!");
+    }
+}
diff --git a/src/C10_Tri_et_complexite/C102_Complexite_algorithmique/App.java b/src/C10_Tri_et_complexite/C102_Complexite_algorithmique/App.java
new file mode 100644
index 0000000..02f6720
--- /dev/null
+++ b/src/C10_Tri_et_complexite/C102_Complexite_algorithmique/App.java
@@ -0,0 +1,7 @@
+package C10_Tri_et_complexite.C102_Complexite_algorithmique;
+
+public class App {
+    public static void main(String[] args) throws Exception {
+        System.out.println("Hello, World!");
+    }
+}
diff --git a/src/C10_Tri_et_complexite/C103_Algorithme_de_tri/App.java b/src/C10_Tri_et_complexite/C103_Algorithme_de_tri/App.java
new file mode 100644
index 0000000..0c83398
--- /dev/null
+++ b/src/C10_Tri_et_complexite/C103_Algorithme_de_tri/App.java
@@ -0,0 +1,7 @@
+package C10_Tri_et_complexite.C103_Algorithme_de_tri;
+
+public class App {
+    public static void main(String[] args) throws Exception {
+        System.out.println("Hello, World!");
+    }
+}