diff --git a/ex3/main.c b/ex3/main.c
index e85b866ad535c9c7b46b0f168b0d28f898c415be..e5ffd296a2579e2f74187ddce19b8f445521294f 100644
--- a/ex3/main.c
+++ b/ex3/main.c
@@ -1,7 +1,7 @@
 /**
  * @file main.c
- * @author Prénom Nom
- * @brief Exercice 1
+ * @author Florian Burgener
+ * @brief Exercice 3
  * @version 1.0
  * @date 2021-12-07
  * 
@@ -9,20 +9,28 @@
  * 
  */
 
-#include <math.h>
-#include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
 
+/**
+ * @brief Count all the possibilities of dividing a sum of money into pieces of 2, 5 and 10.
+ * 
+ * @param remaining_money 
+ * @param available_money 
+ * @return int32_t 
+ */
 int32_t count_posibilities(int32_t remaining_money, int32_t available_money) {
-    if (available_money == 1) {        
+    if (available_money == 1) {
+        // No matter how much money is left, it is a possibility because you can have n * 1 pieces.
         return 1;
     }
 
     int32_t next_available_money = available_money;
 
+    // Determines which unit of money will be used for further calculations.
+    // 10 => 2
+    // 2 => 1
     if (next_available_money == 10) {
         next_available_money = 2;
     } else if (next_available_money == 2) {
@@ -30,21 +38,24 @@ int32_t count_posibilities(int32_t remaining_money, int32_t available_money) {
     }
 
     int32_t count = 0;
-    int32_t i = 1;
+    int32_t i = 0;
 
-    while (remaining_money >= i * available_money) {        
+    // As long as the multiplication of i by the current money unit is smaller than or equal to the remaining money, continue to loop.
+    while (remaining_money >= i * available_money) {
+        // Calls back the function by withdrawing the right amount of money.
         count += count_posibilities(remaining_money - available_money * i, next_available_money);
         i += 1;
     }
-    
-    count += count_posibilities(remaining_money, next_available_money);
+
     return count;
 }
 
 int main() {
     int32_t input;
     scanf("%d", &input);
+
     int32_t count = count_posibilities(input, 10);
     printf("\n%d\n", count);
+
     return EXIT_SUCCESS;
 }
\ No newline at end of file