题解 | #两数之和#

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