diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index f32b144..7c9d8bc 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -148,10 +148,12 @@
   },
   "active": "26ca4bd66426e29b",
   "lastOpenFiles": [
+    "Algo/Séminaire/Weird stuff.md",
     "Algo/Séminaire/Chapter 3 - Case analysis.md",
+    "Untitled",
     "Algo/Séminaire/Exercices seminaire.md",
-    "Algo/Séminaire/Chapter 2 - Functions.md",
     "Algo/Séminaire/Chapter 1 - CAML basics.md",
+    "Algo/Séminaire/Chapter 2 - Functions.md",
     "Algo/Séminaire/Introduction.md",
     "Algo/Séminaire/assets/69E2987C-209A-48CD-8964-5A60462966E5.jpg",
     "Algo/Séminaire/assets",
diff --git a/Algo/Séminaire/Exercices seminaire.md b/Algo/Séminaire/Exercices seminaire.md
index 6ed0948..8943a57 100644
--- a/Algo/Séminaire/Exercices seminaire.md	
+++ b/Algo/Séminaire/Exercices seminaire.md	
@@ -173,29 +173,32 @@ val highest_square_sum : int -> int -> int -> int = <fun>
 ## Exercise 3.7
 ```Ocaml
 # let rate_eco kg = match kg with
-	x when x <= 500. -> 3.40
-	| x when x <=1000. -> 4.60
-	| x when x <= 2000. -> 5.10
-	| x when x <= 3000. -> 6.90 ;;
-val rate_eco : float -> float = <fun>
+	x when x <= 500 -> 3.40
+	| x when x <=1000 -> 4.60
+	| x when x <= 2000 -> 5.10
+	| x when x <= 3000 -> 6.90
+	| _ -> invalid_arg "Cannot be more than 3000g";;
+val rate_eco : int -> float = <fun>
 
 # let rate_standard kg = match kg with
-	x when x <= 500. -> 4.60
-	| x when x <=1000. -> 5.90
-	| x when x <= 2000. -> 6.50
-	| x when x <= 3000. -> 7.20;;
-val rate_standart : float -> float = <fun>
+	x when x <= 500 -> 4.60
+	| x when x <=1000 -> 5.90
+	| x when x <= 2000 -> 6.50
+	| x when x <= 3000 -> 7.20
+	| _ -> invalid_arg "Cannot be more than 3000g";;
+val rate_standart : int -> float = <fun>
 
 # let rate_express kg = match kg with
-	x when x <= 500. -> 9.10
-	| x when x <=1000. -> 11.
-	| x when x <= 2000. -> 13.5
-	| x when x <= 3000. -> 14.2;;
-val rate_express : float -> float = <fun>
+	x when x <= 500 -> 9.10
+	| x when x <=1000 -> 11.
+	| x when x <= 2000 -> 13.5
+	| x when x <= 3000 -> 14.2;
+	| _ -> invalid_arg "Cannot be more than 3000g";;
+val rate_express : int -> float = <fun>
 
 # let rate rt kg = match rt with
 	x when x = "economic" -> rate_eco(kg)
 	| x when x = "standard" -> rate_standard(kg)
 	| x when x = "express" -> rate_express(kg)
-	| _ -> invalid_arg "Bad type of shipping class"
-val rate : string -> float -> float = <fun>
+	| _ -> invalid_arg "Bad type of shipping class";;
+val rate : string -> int -> float = <fun>
diff --git a/Algo/Séminaire/Weird stuff.md b/Algo/Séminaire/Weird stuff.md
new file mode 100644
index 0000000..c7ce9d0
--- /dev/null
+++ b/Algo/Séminaire/Weird stuff.md	
@@ -0,0 +1,3 @@
+```Ocaml
+10 mod (-3) = 10 mod 3
+```