diff --git a/stack_functions/push.c b/stack_functions/push.c
new file mode 100644
index 0000000..dc0d101
--- /dev/null
+++ b/stack_functions/push.c
@@ -0,0 +1,33 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   push.c                                             :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: mteriier <mteriier@student.42lyon.fr>      +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/12/08 15:09:40 by mteriier          #+#    #+#             */
+/*   Updated: 2025/12/08 15:28:53 by mteriier         ###   ########lyon.fr   */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "push_swap.h"
+
+void	pa(t_stacks *stacks)
+{
+	t_stack	a;
+
+	if (!stacks || !stacks->b)
+		return ;
+	a = stack->a;
+	a-value = stacks->b->value;
+}
+
+void	pb(t_stacks *stacks)
+{
+	t_stack	b;
+
+	if (!stacks || !stacks->a)
+		return ;
+	b = stacks->b;
+	b->value = stacks->a->value;
+}