#include
#include
#include
#include
#include

using namespace std;
const int M = 10003;

//定义数据节点
class dNode{
public:
 string name;
 int age;
 double score;
 dNode():name("no name"), age(0), score(0.0){}
 dNode(string name, int age, double score):name(name), age(age), score(score){}
 bool operator < (const dNode & d){
  return score < d.score;
 }
 bool operator > (const dNode &d){
  return score > d.score;
 }
 bool operator = (const dNode &d){
  name = d.name;age=d.age;score=d.score;
 }
 bool operator == (const dNode &d){
  return name == d.name && age == d.age && score == d.score;
 }
 void swap(dNode & a, dNode & b){
  dNode tmp = a;
  a = b;
  b = tmp;
 }
 void show(){
  cout