面试题57. 和为s的两个数字

vector<int> twoSum(vector<int> &nums, int target) {
    vector<int> v;
    int l = 0, r = nums.size() - 1;
    while (l <= r) {
        if (nums.at(l) + nums.at(r) == target) {
            v.emplace_back(nums.at(l)), v.emplace_back(nums.at(r));
            break;
        } else if (nums.at(l) + nums.at(r) < target)
            l++;
        else if (nums.at(l) + nums.at(r) > target)
            r--;
    }
    return v;
}