제출 #742741

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
742741		ToniB	Financial Report (JOI21_financial)	C++17	53 / 100	759 ms	36584 KiB

Main

#include <bits/stdc++.h>
using namespace std;
const int MAXN = 3e5 + 2;
const int OFF = 1 << 20;

int n, d, a[MAXN], ans, dp[7005];
int tour[OFF];
priority_queue<int, vector<int>, greater<int> > pq;
multiset<int> ms;

vector<int> cmp;
map<int, int> um;

int f(int x, int l, int r, int ql, int qr){
	if(ql <= l && r <= qr) return tour[x];
	if(ql > r || l > qr) return 0;
	int mid = (l + r) >> 1;
	return max(f(x * 2 + 1, l, mid, ql, qr), f(x * 2 + 2, mid + 1, r, ql, qr));
}
void upd(int x, int l, int r, int i, int val){
	if(l > i || r < i) return ;
	if(l == r){
		tour[x] = val;
		return ;
	}
	int mid = (l + r) >> 1;
	upd(x * 2 + 1, l, mid, i, val);
	upd(x * 2 + 2, mid + 1, r, i, val);
	tour[x] = max(tour[x * 2 + 1], tour[x * 2 + 2]);
}

int main(){
	cin >> n >> d;
	for(int i = 0; i < n; ++i){
		cin >> a[i];
		cmp.push_back(a[i]);
	}
	sort(cmp.begin(), cmp.end());
	cmp.erase(unique(cmp.begin(), cmp.end()), cmp.end());

	for(int i = 0; i < (int)cmp.size(); ++i) um[cmp[i]] = i;
	for(int i = 0; i < n; ++i) a[i] = um[a[i]];

	if(n <= 7005){
		for(int i = 0; i < n; ++i){
			dp[i] = max(dp[i], 1);
			int prv_less, k = n - 1;
			for(int j = i; j < n; ++j){
				if(a[j] <= a[i]) prv_less = j;
				if(j - prv_less == d){
					k = j; break;
				}
			}
			for(int j = i + 1; j <= k; ++j){
				if(a[j] > a[i]) dp[j] = max(dp[j], dp[i] + 1);
			}
			ans = max(ans, dp[i]);
		}
		cout << ans << "\n";
		return 0;
	}

	for(int i = 0; i < n; ++i){
		int x = 0;
		if(a[i]) x = f(0, 0, n - 1, 0, a[i] - 1);
		upd(0, 0, n - 1, a[i], x + 1);
		ans = max(ans, x + 1);

		ms.insert(a[i]);
		pq.push(a[i]);

		if(i >= d){
			ms.erase(ms.find(a[i - d]));
			int mini = *ms.begin();
			while(!pq.empty() && pq.top() < mini){
				int x = pq.top();
				upd(0, 0, n - 1, x, 0);
				pq.pop();
			}
		}
	}
	cout << ans;
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'int main()':
Main.cpp:50:10: warning: 'prv_less' may be used uninitialized in this function [-Wmaybe-uninitialized]
   50 |     if(j - prv_less == d){
      |        ~~^~~~~~~~~~

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