#include <bits/stdc++.h>

using namespace std;

int main()
{
    int n, k;
    cin >> n >> k;
    int cur,d=k,next,pos=1;
    cin >> cur;
    bool done = false;

    for(int i = 1; i < n; i++)
    {
        cin >> next;
        if(next <= cur)
        {
            d--;
            if(d==0)
            {
                cout << pos;
                done = true;
                break;
            }
        }
        else
        {
            d=k;
            cur = next;
            pos = i+1;
        }

    }
    if(!done)
    {
        cout << pos;
    }
}