java">import java.util.*;
public class Main{public static void main(String[] args){Scanner in=new Scanner(System.in);int n=Integer.parseInt(in.nextLine());//已注册app列表List<Log> list=new ArrayList<>();for(int k=0;k<n;k++){String[] str=in.nextLine().split(" ");String name=str[0];int level=Integer.parseInt(str[1]);double begin=transTime(str[2]),end=transTime(str[3]);Log cur=new Log(begin,end,name,level);//冲突标志int conflict=0;for(int i=0;i<list.size();i++){Log pre=list.get(i);// 冲突发生if(check(pre,cur)){conflict=1;//待注册的app优先级更低，不能注册if(pre.level>=cur.level){break;}int j=i+1;boolean flag=true;//扫描pre之后注册的app信息while(j<list.size()){Log tmp=list.get(j);// 存在冲突且已注册app的优先级更高，当前app不能注册if(tmp.begin<cur.end&&tmp.level>cur.level){flag=false;break;}j++;}if(flag){list.remove(i);list.add(cur);}else{break;}                                     }}//未发生冲突，注册if(conflict==0){list.add(cur);}}double query=transTime(in.nextLine());String ans="NA";        for(Log log:list){if(log.begin<=query&&query<=log.end){ans=log.name;break;}}  System.out.println(ans);      }//时间格式转成小时public static double transTime(String s){String[] arr=s.split(":");double ans=0;ans+=Integer.parseInt(arr[0]);ans+=Integer.parseInt(arr[1])*1.0/60;return ans;}//冲突检查public static boolean check(Log pre,Log cur){if(pre.end<=cur.begin||cur.end<=pre.begin){return false;}return true;}
}
class Log{double begin,end;String name;int level;public Log(double begin,double end,String name,int level){this.begin=begin;this.end=end;this.name=name;this.level=level;}
}

注：按照图例，应该不存在两个app注册时间仅有一个交点（相同时刻）的情况，如app1:   09:00-10:00, app2:  10:00-11:00