Excel can sort records according to any column. Now you are supposed to imitate this function.

Input Specification:

Each input file contains one test case. For each case, the first line contains two integers N (≤10​5​​) and C, where N is the number of records and C is the column that you are supposed to sort the records with. Then Nlines follow, each contains a record of a student. A student's record consists of his or her distinct ID (a 6-digit number), name (a string with no more than 8 characters without space), and grade (an integer between 0 and 100, inclusive).

Output Specification:

For each test case, output the sorting result in N lines. That is, if C = 1 then the records must be sorted in increasing order according to ID's; if C = 2 then the records must be sorted in non-decreasing order according to names; and if C = 3 then the records must be sorted in non-decreasing order according to grades. If there are several students who have the same name or grade, they must be sorted according to their ID's in increasing order.

Sample Input 1:

3 1

000007 James 85

000010 Amy 90

000001 Zoe 60

Sample Output 1:

000001 Zoe 60

000007 James 85

000010 Amy 90

Sample Input 2:

4 2

000007 James 85

000010 Amy 90

000001 Zoe 60

000002 James 98

Sample Output 2:

000010 Amy 90

000002 James 98

000007 James 85

000001 Zoe 60

Sample Input 3:

4 3

000007 James 85

000010 Amy 90

000001 Zoe 60

000002 James 90

Sample Output 3:

000001 Zoe 60

000007 James 85

000002 James 90

000010 Amy 90

#include <stdio.h>

#include <algorithm>

#include <string>

#include <iostream>

using namespace std;

const int maxn=;

struct stu{

  string id;

  string name;

  int grade;

}students[maxn];

bool cmp1(stu s1,stu s2){

  return s1.id<s2.id;

}

bool cmp2(stu s1,stu s2){

  if(s1.name==s2.name)  return s1.id<s2.id;

  else return s1.name<s2.name;

}

bool cmp3(stu s1,stu s2){

  if(s1.grade==s2.grade)  return s1.id<s2.id;

  else return s1.grade<s2.grade;

}

int main(){

  int n,c;

  scanf("%d %d",&n,&c);

  for(int i=;i<n;i++){

    cin>>students[i].id>>students[i].name>>students[i].grade;

  }

  if(c==){

    sort(students,students+n,cmp1);

  }

  else if(c==){

    sort(students,students+n,cmp2);

  }

  else if(c==){

    sort(students,students+n,cmp3);

  }

  for(int i=;i<n;i++){

    printf("%s %s %d\n",students[i].id.c_str(),students[i].name.c_str(),students[i].grade);

  }

}