diff --git a/problems/0707.设计链表.md b/problems/0707.设计链表.md
index 00886039..42912eda 100644
--- a/problems/0707.设计链表.md
+++ b/problems/0707.设计链表.md
@@ -353,8 +353,12 @@ class MyLinkedList {
             return;
         }
         size--;
+        if (index == 0) {
+            head = head.next;
+	    return;
+        }
         ListNode pred = head;
-        for (int i = 0; i < index; i++) {
+        for (int i = 0; i < index - 1; i++) {
             pred = pred.next;
         }
         pred.next = pred.next.next;