#ifndef local
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("O3")
#endif
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
using ll = long long;
using pll = pair<ll,ll>;
using str = string;
using ld = long double;
auto sd = std::chrono::high_resolution_clock::now().time_since_epoch().count();
mt19937 rnd(sd);
struct sg {
ll ans = 0;
sg *l = nullptr, *r = nullptr;
sg(){
ans = 0;
l = nullptr;
r =nullptr;
}
void update(ll left, ll right, ll ix, ll val){
if (ix < left || right<=ix) {
return;
}
else if (ix == left && ix+1==right) {
ans =val;
return;
}
else {
ll mid = (left + right)/2;
if (!l) l = new sg(); l->update(left, mid, ix, val);
if (!r) r = new sg(); r->update(mid, right, ix,val);
ans = max(l->ans, r->ans);
}
}
ll get(ll left, ll right, ll sl, ll sr) {
if (right <= sl || left >= sr) {
return 0;
}
else if (sl <= left && right <= sr) {
return ans;
}
else {
ll mid = (left + right)/2;
ll ansl = 0; ll ansr = 0;
if (l) ansl = l->get(left, mid, sl, sr);
if (r) ansr = r->get(mid, right, sl, sr);
return max(ansl,ansr);
}
}
};
sg d1 = sg();
sg d2 = sg();
vector<vector<ll>> changes;
ll dp[200005];
ll dp1[200005];
void solve1() {
ll n, x;
cin >> n >> x;
vector<ll> t(n);
ll maxA = x;
for (int i =0; i <n ;i++){
cin>>t[i];
maxA= max(maxA, t[i]);
}
ll cnt= maxA;
ll mx = 0;
for (int i = n-1; i >=0; i--){
dp[i] = d1.get(0, cnt+1, t[i]+1, cnt+1)+1;
mx =max(mx, dp[i]);
changes.push_back({t[i], d1.get( 0, cnt+1, t[i], t[i]+1)});
if (changes.back()[1] < dp[i]) {
d1.update(0, cnt+1, t[i], dp[i]);
}
}
for (int i =0; i < n; i++){
d1.update(0, cnt+1, changes.back()[0],changes.back()[1]);
dp1[i] = d2.get(0, cnt+1, 0, t[i])+1;
if (d2.get(0, cnt+1, t[i] ,t[i]+1)< dp1[i]){
d2.update(0, cnt+1, t[i], dp1[i]);
}
mx= max(mx, dp1[i]);
mx = max(mx, dp1[i] + d1.get(0, cnt+1, max(0ll, t[i]-x+1), cnt+1));
changes.pop_back();
}
cout<<mx;
}
signed main() {
ios_base::sync_with_stdio(false);
cin.tie(0);
#ifdef local
freopen("in.txt", "r", stdin);
freopen("out.txt", "w", stdout);
#endif
ll t1 = 1;
for (int _ = 0; _ < t1; ++_) solve1();
#ifdef local
printf_s("\n%.5f s", (double) clock() / CLOCKS_PER_SEC);
#endif
}
