题解 | #合并两群能量值#

/**
 * struct ListNode {
 *	int val;
 *	struct ListNode *next;
 *	ListNode(int x) : val(x), next(nullptr) {}
 * };
 */
class Solution {
public:
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * 
     * @param l1 ListNode类 
     * @param l2 ListNode类 
     * @return ListNode类
     */
    ListNode* mergeEnergyValues(ListNode* l1, ListNode* l2) {
        // write code here
        auto * phead = new ListNode(-1);
        auto cur = phead;
        while(l1 && l2){
            if(l1->val >= l2->val){
                auto temp = l1->next;
                l1->next = nullptr;
                cur->next = l1;
                cur = cur -> next;
                l1 = temp;
            }else{
                auto temp = l2->next;
                l2->next = nullptr;
                cur->next = l2;
                cur = cur->next;
                l2 = temp;
            }
        }
        if(l2){
            cur->next = l2;
        }
        if(l1){
            cur->next = l1;
        }
        return phead->next;
    }
};