#include <iostream>

using namespace std;

int main()
{
    int n,k,v[1001],volumcamion=0,i=1;
    cin>>n>>k;
    for(i=1;i<=k,i<=n;i++)
    {
        cin>>v[i];
        if(v[i]>volumcamion)
            volumcamion=v[i];
    }
    cout<<volumcamion;
    return 0;
}