#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
long long Min = 1000000000000000LL;
int main() {
    long long a, n, k;
cin>>n>>k;
    
    for(int i=0;i<n;i++)
        {
        cin>>a;
        if(i-k <=0 && i+k>=n-1)
            {
            Min=min(a, Min);
        }
    }
    cout<<Min;return 0;
}