#include <bits/stdc++.h>
#define For(i,a,b) for(int i = a; i <= b; i++)
#define Ford(i,a,b) for(int i = a; i >= b; i--)
#define ll long long
#define ii pair<int,int>
#define fi first
#define se second
#define all(v) v.begin(),v.end()
#define RRH(v) v.resize(unique(all(v)) - v.begin())
using namespace std;
const int N = 1e6+7;
const int M = 1e9+7;
const ll oo = 3e18;
int n, a[N], d, dp[N];
ii b[N];
int st[N];
void up(int id, int l, int r, int u, int v) {
if (l > u or r < u) return;
if (l == r) {
st[id] = v;
return;
}
int mid = l + r >> 1;
up(id * 2, l, mid, u, v);
up(id * 2 + 1, mid + 1, r, u, v);
st[id] = max(st[id * 2], st[id * 2 + 1]);
}
int get(int id, int l, int r, int u, int v) {
if (l > v or r < u) return 0;
if (u <= l and r <= v) return st[id];
int mid = l + r >> 1;
return max(get(id * 2, l, mid, u, v), get(id * 2 + 1, mid + 1, r, u, v));
}
int main() {
ios::sync_with_stdio(0); cin.tie(0);
#define TASK ""
if (fopen (".inp", "r")) {
freopen (".inp", "r", stdin);
freopen (".out", "w", stdout);
}
if(fopen(TASK".inp", "r")) {
freopen(TASK".inp", "r", stdin);
freopen(TASK".out", "w", stdout);
}
cin >> n >> d;
For (i, 1, n) cin >> a[i], b[i] = {a[i], i};
For (i, 1, n) dp[i] = 0;
sort (b + 1, b + n + 1, [](ii a, ii b) {
if (a.fi == b.fi) return a.se > b.se;
return a.fi > b.fi;
});
memset(st, 0, sizeof st);
queue<int> q;
For (i, 1, n) {
if (b[i].fi != b[i - 1].fi) {
while(q.size()) {
int k = q.front();
q.pop();
up(1, 1, n, k, dp[k]);
}
}
int pos = b[i].se;
dp[pos] = max(dp[i], get(1, 1, n, i + 1, i + d)) + 1;
q.push(pos);
}
cout << get(1, 1, n, 1, n) << '\n';
return 0;
}
