// Source: https://usaco.guide/general/io

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define vll vector<long long>



int main() 
{
	ll n, k; cin >> n >> k;
	vll v(n,0);
	int a;
	for(int i = 0; i < n; i++)
	{
		cin >> a >> v[i];
	}

	sort(v.begin(),v.end());
	cout << v[n-k-1];
}