leetcodepushfront LeetCode 力码

leetcode推前力码接受的最喜欢/采访问题的提交1.二和相关主题：数组、哈希表class Solution { public: vector< int > twoSum (vector< int >& nums, int target) { unordered_map< int , int > hash; for ( int i= 0 ;i ({hash[j], i}); } else { hash[target-j]=i; } } return vector< int >(); } }; 2.两个数相加相关主题：链表、数学、递归/* * * Definition for singly-linked list. * struct ListNode { * int val; * ListNode *next; * ListNode() : val(0), next(nullptr)