2024每日刷题(129)
Leetcode—138. 随机链表的复制
实现代码
/*
// Definition for a Node.
class Node {
public:
int val;
Node* next;
Node* random;
Node(int _val) {
val = _val;
next = NULL;
random = NULL;
}
};
*/
class Solution {
public:
Node* copyRandomList(Node* head) {
if(head == nullptr) {
return nullptr;
}
unordered_map<Node*, Node*> map;
Node* cur = head;
while(cur != nullptr) {
Node* s = new Node(cur->val);
map[cur] = s;
cur = cur->next;
}
cur = head;
while(cur != nullptr) {
map[cur]->next = map[cur->next];
map[cur]->random = map[cur->random];
cur = cur->next;
}
return map[head];
}
};
运行结果
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