import java.util.Scanner;

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello World");
        Scanner scanner = new Scanner(System.in);
        System.out.println("清输入一个数");
        int i = scanner.nextInt();
        System.out.println(i);
    }

    public int[] twoSum(int[] nums, int target) {
            for (int i = 0; i < nums.length; i++){
                for(int j = i + 1; j < nums.length; j++){
                    if(nums[i] + nums[j] == target) {
                        return new int[]{i,j};
                    }
                }
            }
            return new int[]{};
        }

}