2。添加两个数字
您将获得两个代表两个非负数的链表。数字以相反的顺序存储,每个节点包含一个数字。添加两个数字并将其作为链接列表返回。
输入:
(2 -> 4 -> 3) + (5 -> 6 -> 4)
输出:7 -> 0 -> 8
我已经完成了Leetcode中第二个问题的代码。当我提交我的答案时,当输入为两个零时,我遇到了运行时错误。但是当我使用自己的自定义Testcase时,它看起来非常好。
我已经仔细检查过我的代码,仍无法找到错误的位置。你能帮帮我吗?
/**
* Definition for singly-linked list.
* struct ListNode {
* int val;
* struct ListNode *next;
* };
*/
struct ListNode* addTwoNumbers(struct ListNode* l1, struct ListNode* l2) {
struct ListNode* p1;
struct ListNode* p2;
struct ListNode* head;
head = (struct ListNode*)malloc(sizeof(struct ListNode*));
struct ListNode* cur = head;
p1 = l1; p2 = l2;
int sum, carry = 0, x, y;
while(p1 || p2)
{
//Assign the values of the listnode to x and y.
if(p1 != NULL) x = p1 -> val; else x = 0;
if(p2 != NULL) y = p2 -> val; else y = 0;
sum = x + y + carry;
//Declare a new node nxt(next) and insert it after the current node
struct ListNode* nxt;
nxt = (struct ListNode*)malloc(sizeof(struct ListNode*));
nxt -> val = sum % 10;
carry = sum / 10;
cur -> next = nxt;
cur = cur -> next;
if(p1 != NULL) p1 = p1 -> next;
if(p2 != NULL) p2 = p2 -> next;
}
if(carry > 0)
{
struct ListNode* nxt;
nxt = (struct ListNode*)malloc(sizeof(struct ListNode*));
nxt -> val = carry;
cur -> next = nxt;
}
head = head -> next;
return head;
}
错误:
自定义测试用例:
答案 0 :(得分:0)
那么如何编辑代码?
正如John Kugelman上面写的那样:
print (df)
No Device
0 1 asus best
1 2 Xiaomi
2 3 xiaomi
3 4 Asus
4 5 Samsung
df['Device'] = df['Device'].str.capitalize()
print (df)
No Device
0 1 Asus best
1 2 Xiaomi
2 3 Xiaomi
3 4 Asus
4 5 Samsung