Submission #867770

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
867770	2023-10-29T12:46:14 Z	dio_2	Hacker (BOI15_hac)	C++17	40 / 100	1000 ms	8100 KB

hac

#include<bits/stdc++.h>
using namespace std;

int main(){
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	
	int N;
	cin >> N;
	
	const int NN = 3 * N;
	
	vector<int> A(N);
	for(int &x : A) cin >> x; // A[i] <= 2000

	for(int i = 0;i < N;i++) A.push_back(A[i]);
	for(int i = 0;i < N;i++) A.push_back(A[i]);
	
	vector<array<int, 3>> wids;
	auto add = [&](int s, int l, int r)->void{
		wids.push_back({s, l, r});
	};
	
	int K = (N + 1) / 2;
	int sum = 0;
	for(int i = 0;i < K;i++){
		sum += A[N-K+i+1];
	}
	
	add(sum, N-K+1, N);
	
	for(int i = N + 1;i < 3 * N;++i){
		sum += A[i];
		sum -= A[i - K];
		add(sum, i - K + 1, i);
	}
	
	vector<int> in(NN, -1), out(NN, -1);
	vector<int> sums;
	int id = 0;
	for(auto [s, l, r] : wids){
		sums.push_back(s);
		swap(l, r);
		if(in[l] == -1) in[l] = id;
		if(out[r] == -1 && in[r] != -1) out[r] = id;
		++id;
	}
	
	int ans = 0;
	
	for(int i = 0;i < NN;i++){
		int res = 1000 * NN;
		if(in[i] == -1 || out[i] == -1) continue;
		for(int j = in[i];j <= out[i];j++) res = min(res, sums[j]);
		ans = max(ans, res);
	}
	
	cout << ans << '\n';
	
	return 0;
}

Subtask #1

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	452 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	1 ms	604 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	1 ms	344 KB	Output is correct
7	Correct	1 ms	344 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	360 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct

Subtask #2

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	452 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	1 ms	604 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	1 ms	344 KB	Output is correct
7	Correct	1 ms	344 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	360 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	0 ms	348 KB	Output is correct
20	Correct	1 ms	348 KB	Output is correct
21	Correct	1 ms	348 KB	Output is correct
22	Correct	7 ms	600 KB	Output is correct
23	Correct	19 ms	860 KB	Output is correct
24	Correct	7 ms	604 KB	Output is correct
25	Correct	18 ms	844 KB	Output is correct
26	Correct	18 ms	856 KB	Output is correct
27	Correct	0 ms	344 KB	Output is correct
28	Correct	0 ms	344 KB	Output is correct
29	Correct	1 ms	344 KB	Output is correct
30	Correct	18 ms	844 KB	Output is correct
31	Correct	18 ms	1088 KB	Output is correct

Subtask #3

0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	344 KB	Output is correct
2	Correct	1 ms	344 KB	Output is correct
3	Correct	18 ms	844 KB	Output is correct
4	Execution timed out	1025 ms	8100 KB	Time limit exceeded
5	Halted	0 ms	0 KB	-

Subtask #4

0 / 40.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	452 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	1 ms	604 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	1 ms	344 KB	Output is correct
7	Correct	1 ms	344 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	360 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	0 ms	348 KB	Output is correct
20	Correct	1 ms	348 KB	Output is correct
21	Correct	1 ms	348 KB	Output is correct
22	Correct	7 ms	600 KB	Output is correct
23	Correct	19 ms	860 KB	Output is correct
24	Correct	7 ms	604 KB	Output is correct
25	Correct	18 ms	844 KB	Output is correct
26	Correct	18 ms	856 KB	Output is correct
27	Correct	0 ms	344 KB	Output is correct
28	Correct	0 ms	344 KB	Output is correct
29	Correct	1 ms	344 KB	Output is correct
30	Correct	18 ms	844 KB	Output is correct
31	Correct	18 ms	1088 KB	Output is correct
32	Correct	0 ms	344 KB	Output is correct
33	Correct	1 ms	344 KB	Output is correct
34	Correct	18 ms	844 KB	Output is correct
35	Execution timed out	1025 ms	8100 KB	Time limit exceeded
36	Halted	0 ms	0 KB	-