Submission #1280860

#	Time	Username	Problem	Language	Result	Execution time	Memory
1280860		am_aadvik	Financial Report (JOI21_financial)	C++20	60 / 100	4091 ms	39172 KiB

Main

#include<iostream>
#include<vector>
#include<set>
#include<algorithm>
using namespace std;

int main() {
	ios_base::sync_with_stdio(false); cin.tie(NULL);
	int n, d, ans = 0; cin >> n >> d;
	vector<int> a(n), dp(n, 1);
	for (auto& x : a) cin >> x;
	if (d == 1) {
		vector<int> nxt(n, -1);
		set<int> s;
		vector<pair<int, int>> sa(n);
		for (int i = 0; i < n; ++i) sa[i] = { a[i], i };
		sort(sa.begin(), sa.end());
		vector<pair<int, vector<int>>> arr;
		for (int i = 0; i < n; ++i)
			if ((i == 0) || (sa[i - 1].first < sa[i].first))
				arr.push_back({ sa[i].first, {sa[i].second} });
			else arr.back().second.push_back(sa[i].second);
		int m = arr.size();
		for (int i = m - 1; i >= 0; --i) {
			for (auto x : arr[i].second) {
				auto it = s.lower_bound(x + 1);
				if (it != s.end()) nxt[x] = *it;
			}
			for (auto x : arr[i].second) s.insert(x);
		}
		for (int i = n - 1; i >= 0; --i)
			dp[i] = ((nxt[i] == -1) ? 0 : dp[nxt[i]]) + 1;
		int mx = 0;
		for (auto x : dp) mx = max(x, mx);
		cout << mx << endl;
	}
	else {
		for (int i = n - 1; i >= 0; --i) {
			int ld = i + d;
			for (int j = i + 1; j <= min(n - 1, ld); ++j) {
				if (a[i] >= a[j]) ld = j + d;
				else dp[i] = max(dp[i], dp[j] + 1);
			}
			ans = max(ans, dp[i]);
		}
		cout << ans;
	}
}

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 20 / 20
• Subtask 4: 12 / 12
• Subtask 5: 0 / 5
• Subtask 6: 0 / 35