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程式語言 - LeetCode - C++ - 167. Two Sum II - Input Array Is Sorted

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題目：


解答：

class Solution {
public:
    vector<int> twoSum(vector<int>& numbers, int target) {
        int l = 0;
        int r = numbers.size() - 1;

        while (l < r) {
            int sum = numbers[l] + numbers[r];

            if (sum == target) {
                return { l + 1, r + 1};
            }
            else if (sum < target) {
                l += 1;
            }
            else {
                r -= 1;
            }
        }

        return {};
    }
};