题目：

题解：

class Solution {
public:vector<int> twoSum(vector<int>& numbers, int target) {int low = 0, high = numbers.size() - 1;while (low < high) {int sum = numbers[low] + numbers[high];if (sum == target) {return {low + 1, high + 1};} else if (sum < target) {++low;} else {--high;}}return {-1, -1};}
};