最后俩点RE了

#include<cstring>
#include<iostream>
#include<algorithm>
#include<cstdio>
#include<cmath>
#define ll long long
using namespace std;
ll n,a[100000],m;
int main()
{
	cin>>n>>m;
	for(int i=1;i<=n;i++){
			cin>>a[i];
	}
	sort(a,a+n);
	cout<<a[m];
	return 0;
}