#206.Reverse Linked List [LeetCode Grind 75 in Java]

class Solution {
    public ListNode reverseList(ListNode head) {
        ListNode prev = null;
        ListNode curr = head;

        while(curr != null){
            ListNode temp = curr.next;
            curr.next = prev;
            prev = curr;
            curr = temp;
        }

        return prev;
    }
}