#include <unordered_map> 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 nums int整型vector * @param target int整型 * @return int整型vector */ vector<int> twoSum(vector<int>& nums, int target) { // write code here unordered_map<int, int> hash; for (int i = 0; i < nums.size(); ++i) { hash[nums[i]] = i; } for (int i = 0; i < nums.size(); ++i) { if (hash.count(target - nums[i])) { return {i, hash[target - nums[i]]}; } } return {-1, -1}; } };