#include <bits/stdc++.h>
using namespace std;
const int maxn = 3e5 + 5;
vector<int> V;
int A[maxn];
int n, D;
void getr(vector<int> &r) {
set<int> st;
vector<pair<int, int>> arr;
vector<int> op(n + 1), ed(n + 1);
for(int i = 1; i <= n; ++i) {
arr.emplace_back(A[i], -i);
}
sort(begin(arr), end(arr));
for(int i = 0; i < n; ++i) {
int pos = -arr[i].second;
op[pos] = ed[pos] = pos;
auto it = st.upper_bound(pos);
if(it != st.end() && op[*it] < pos) {
r[pos] = *it + D;
continue;
}
it = st.insert(pos).first;
// printf("insert %d\n", pos);
auto xx = next(it);
r[pos] = pos + D;
if(xx != st.end()) {
if(*xx - pos <= D) {
int ll = op[pos];
int rr = ed[*xx];
// printf("merge (%d, %d), (%d, %d)\n", op[pos], ed[pos], op[*xx], ed[*xx]);
ed[ll] = rr;
op[rr] = ll;
r[pos] = rr + D;
if(pos != ll) st.erase(pos);
if(*xx != rr) st.erase(*xx);
}
}
if(it != st.begin()) {
xx = prev(it);
if(pos - *xx <= D) {
int ll = op[*xx];
int rr = ed[pos];
// printf("merge (%d, %d), (%d, %d)\n", op[pos], ed[pos], op[*xx], ed[*xx]);
ed[ll] = rr;
op[rr] = ll;
if(pos != rr) st.erase(pos);
if(*xx != ll) st.erase(*xx);
}
}
}
}
void solve() {
vector<int> dp(n + 1), r(n + 1);
// for(int i = 1; i <= n; ++i) {
// int lst = i;
// for(int j = i; j <= n; ++j) {
// if(j - lst > D) break;
// if(A[j] <= A[i]) lst = j;
// }
// r[i] = lst + D;
// }
// for(int i = 1; i <= n; ++i) printf("%d%c", r[i], " \n"[i == n]);
getr(r);
// for(int i = 1; i <= n; ++i) printf("%d%c", r[i], " \n"[i == n]);
// O(n^2) dp
for(int i = 1; i <= n; ++i) {
dp[i] = 1;
for(int j = 1; j < i; ++j) {
if(r[j] >= i && A[j] < A[i])
dp[i] = max(dp[i], dp[j] + 1);
}
}
cout << *max_element(begin(dp), end(dp)) << '\n';
}
signed main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cin >> n >> D;
for(int i = 1; i <= n; ++i) {
cin >> A[i]; V.push_back(A[i]);
}
sort(begin(V), end(V));
for(int i = 1; i <= n; ++i) {
A[i] = lower_bound(begin(V), end(V), A[i]) - begin(V) + 1;
}
solve();
return 0;
}
