代码ACM模式注意事项

导包：

import java.util.*;

类名：

Main

主函数：

public static void main(String[] args){

}

实例：

import java.util.*;
public class Main{
    public static void main(String args[]) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int data = sc.nextInt();
        ArrayList<Integer> list = new ArrayList<>();
        int order = 0;
        int In = 0;
        int Out = 0;
        for(int i = 0; i < N; i++){
            order = sc.nextInt();
            In = sc.nextInt();
            Out = sc.nextInt();
            if(data >= In && data <= Out){
                list.add(order);
            }
        }
        if(list.size() == 0) System.out.println("null");
        else{
            Collections.sort(list);
            for(int i = 0; i < list.size(); i++){
                System.out.println(list.get(i));
            }
        }
    }
}

精确输出

        sb.setCharAt(start, sb.charAt(end));
        sb.setCharAt(end, temp);