#include <fstream>
using namespace std;

long a[50000]; 
long n, k; 

int main()
{
    long min = 9999900; 
    long min2 = 99999;
    long max;
    long i, j;
    ifstream fin("secventa.in");
    fin >> n >> k;
    for ( i = 0; i < n; i++)
        fin >> a[i];
    fin.close();
    
    for ( i = 0; i < k ; i++)
        if ( a[i] <= min2) 
                if  (a[i] <= min)
                                min = a[i];
                else
                                min2  = a[i];
    i = 0; j = k - 1;
    max = min;
    while ( j < n)
    {
        
        if ( a[j] <= min2 )
                if ( a[j] <= min)
                                 min  = a[j];
                else
                                min2 = a[j];
        if ( min > max) 
                max = min;
        j++; i++;
        if ( a[i] == min) min = min2;
    }    
    
    ofstream fout("secventa.out");
    fout << max << '\n';
    fout.close();
    return 0;
}