// fasor_slidingwindow.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <iostream>
using namespace std;
int main()
{
    int n, k, x, best_h = -1, best_p = -1, jo = -1;
    cin >> n >> k;
    for (int i = 0; i < n; i++) {
        cin >> x;
        if (x > best_h) {
            best_h = x;
            best_p = i;
        }
        if (i - best_p >= k)
        {
            jo = best_p;
            break;
        }
    }
    if (jo == -1 and best_p!=-1) {
        jo = best_p;
    }
    cout << jo + 1;
}

// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu

// Tips for Getting Started: 
//   1. Use the Solution Explorer window to add/manage files
//   2. Use the Team Explorer window to connect to source control
//   3. Use the Output window to see build output and other messages
//   4. Use the Error List window to view errors
//   5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
//   6. In the future, to open this project again, go to File > Open > Project and select the .sln file