diff --git a/indexing.c b/indexing.c
new file mode 100644
index 0000000..01417e2
--- /dev/null
+++ b/indexing.c
@@ -0,0 +1,37 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   indexing.c                                         :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: apommier <apommier@student.42.fr>          +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2022/01/05 03:23:29 by apommier          #+#    #+#             */
+/*   Updated: 2022/01/05 03:23:29 by apommier         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "push_swap.h"
+
+void    lst_indexing(t_list *list)
+{
+	int index;
+	t_list *swap;
+	t_list	*save;
+
+	swap = list;
+	save = list;
+	index = 0;
+	while(save)
+	{
+		index = 1;
+		while (swap)
+		{
+			if (*(int*)save->nbr > *(int*)swap->nbr)
+				index++;
+			swap = swap->next;
+		}
+		save->index = index;
+		swap = list;
+		save = save->next;
+	}
+}
\ No newline at end of file