LeetCode68|和为s的两个数字

示例 1：

输入：nums = [2,7,11,15], target = 9
输出：[2,7] 或者 [7,2]
示例 2：

输入：nums = [10,26,30,31,47,60], target = 40
输出：[10,30] 或者 [30,10]
 

限制：

1 <= nums.length <= 10^5
1 <= nums[i] <= 10^6

 
public class TwoSumTest2 {
    public static void main(String[] args) {
        int[] nums = {2, 7, 11, 15};
        int target = 9;
        int[] twoSum = twoSum(nums, target);
        for (int num : twoSum
        ) {
            System.out.print(num + "\t");
        }
    }

    public static int[] twoSum(int[] nums, int target) {
        if (nums == null || nums.length == 0) {
            return new int[]{-1, -1};
        }
        int i = 0;
        int j = nums.length - 1;
        while (i < j) {
            if (nums[i] + nums[j] == target) {
                return new int[]{nums[i], nums[j]};
            } else if (nums[i] + nums[j] < target) {
                i++;
            } else {
                j--;
            }
        }
        return new int[]{-1, -1};
    }
}