71题怎么做

#include<bits/stdc++.h>
using namespace std;
struct xs{
	string xm;
	int cj;
};
bool cmp(xs q,xs h){
	return q.cj>h.cj;
}
int main(){
	xs a[21];
	int n,k;
	cin>>n>>k;
	for(int i=1;i<=n;i++){
		cin>>a[i].xm>>a[i].cj;
	}
	sort(a+1,a+n+1,cmp);
	cout<<a[k].xm<<" "<<a[k].cj;
	return 0;
}