#include <iostream>
#include <algorithm>
#include <vector>
#include <map>
#include <set>
#include <queue>
using namespace std;
typedef long long ll;
// second mod 998244353
const ll N = 3e5 + 5;
ll a[N], b[N], dp[N];
struct order
{
ll i, v;
};
bool cmp(order x, order y) {
if (x.v == y.v) return x.i > y.i;
return x.v < y.v;
}
ll seg[10 * N];
inline void update(ll node, ll l, ll r, ll ind, ll vl) {
if (l == r) return void(seg[node] = vl);
ll mid = (l + r) / 2;
if (ind <= mid)
update(node * 2, l, mid, ind, vl);
else update(node * 2 + 1, mid + 1, r, ind, vl);
seg[node] = max(seg[node * 2], seg[node * 2 + 1]);
}
inline void del(ll node, ll l, ll r, ll ind) {
if (l == r) return void(seg[node] = 0);
ll mid = (l + r) / 2;
if (ind <= mid)
del(node * 2, l, mid, ind);
else del(node * 2 + 1, mid + 1, r, ind);
seg[node] = max(seg[node * 2], seg[node * 2 + 1]);
}
inline ll get(ll node, ll l, ll r, ll lx, ll rx) {
if (l >= lx && r <= rx) return seg[node];
if (l > rx || r < lx) return 0;
ll mid = (l + r) / 2;
ll r1 = get(node * 2, l, mid, lx, rx);
ll r2 = get(node * 2 + 1, mid + 1, r, lx, rx);
return max(r1, r2);
}
int main() {
ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
ll n, d; cin >> n >> d;
vector<ll> v; map<ll, ll> cm;
for (ll i = 1; i <= n; ++i) {
cin >> a[i];
v.push_back(a[i]);
}
sort(v.begin(), v.end());
ll MX = 2;
for (ll i = 1; i < n; ++i) {
if (v[i] != v[i - 1]) cm[v[i]] = MX++;
}
++MX;
for (ll i = 1; i <= n; ++i) a[i] = cm[a[i]];
ll res = 0;
for (ll i = n; i > 0; --i) {
if (n - i <= d) {
ll x = get(1, 1, MX, a[i] + 1, MX);
++x;
res = max(res, x);
update(1, 1, MX, a[i], x);
dp[i] = x;
}
else {
ll k = 0;
for (ll j = i + 1, cn = 1; j <= n && cn <= d; ++j, ++cn) {
if (a[j] > a[i]) k = max(k, dp[j]);
}
ll x = k + 1;
res = max(res, x);
dp[i] = x;
}
}
cout << res;
}
