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/*
DavitMarg
In a honky-tonk,
Down in Mexico
*/
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <string>
#include <cstring>
#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>
#include <queue>
#include <bitset>
#include <stack>
#include <cassert>
#include <iterator>
#include <random>
#include <chrono>
#define mod 998244353ll
#define LL long long
#define LD long double
#define MP make_pair
#define PB push_back
#define all(v) v.begin(), v.end()
#define fastIO ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
using namespace std;
const int N = 500005;
int n, d;
int a[N];
void norm()
{
vector<pair<int, int>> v;
v.push_back(MP(-1, 0));
for (int i = 1; i <= n; i++)
v.push_back(MP(a[i], i));
sort(all(v));
for (int i = 1; i <= n; i++)
if (v[i].first == v[i - 1].first)
a[v[i].second] = a[v[i - 1].second];
else
a[v[i].second] = 1 + a[v[i - 1].second];
}
int dp[N], lst[N];
int stress_solve()
{
int best = 0;
for (int mask = 0; mask < (1 << n); mask++)
{
vector<int> v;
for (int i = 0; i < n; i++)
{
if(((1 << i) & mask) == 0)
continue;
v.push_back(i + 1);
}
int mx = -mod;
int res = 0;
for (int i = 0; i < v.size(); i++)
{
if (a[v[i]] > mx)
{
mx = a[v[i]];
res++;
}
if (i && v[i] - v[i - 1] > d)
{
res = 0;
break;
}
}
best = max(best, res);
}
return best;
}
void solve()
{
cin >> n >> d;
for (int i = 1; i <= n; i++)
cin >> a[i];
// norm();
vector<int> st;
st.push_back(0);
a[0] = -1;
lst[0] = 1;
for (int i = 1; i <= n; i++)
{
lst[i] = max(1, i - d);
while (a[st.back()] > a[i])
st.pop_back();
if(i - st.back() <= d)
lst[i] = lst[st.back()];
st.push_back(i);
}
for (int i = 1; i <= n; i++)
{
dp[i] = 1;
for (int j = i - 1; j >= lst[i]; j--)
if (a[i] > a[j])
dp[i] = max(dp[i], dp[j] + 1);
}
int ans = 1;
for(int i = 1; i <= n; i++)
ans = max(ans, dp[i]);
cout << ans << endl;
}
int main()
{
fastIO;
int T = 1;
//cin >> T;
while (T--)
{
solve();
}
return 0;
}
/*
7 1
1 4 4 5 3 2 1
*/
컴파일 시 표준 에러 (stderr) 메시지
Main.cpp: In function 'int stress_solve()':
Main.cpp:68:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
68 | for (int i = 0; i < v.size(); i++)
| ~~^~~~~~~~~~
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