Submission #467490

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
467490	2021-08-23T09:12:07 Z	maeola	Hacker (BOI15_hac)	C++17	100 / 100	463 ms	43844 KB

hac

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

int N;
int A[500069];
vector<int> W[500069];

int main() {
    ios::sync_with_stdio(0);
    cin >> N;
    for (int i = 0; i < N; i++) {
        cin >> A[i];
    }
    int k = (N + 1) / 2;
    int b = k;
    int sum = 0;
    for (int i = 0; i < b; i++) sum += A[i];
    for (int a = 0; a < N; a++) {
        W[a].push_back(sum);
        W[b].push_back(-sum);
        sum = sum + A[b] - A[a];
        b = (b + 1) % N;
    }
    multiset<int> E;
    for (int i = N - k; i < N; i++) {
        for (int a : W[i]) if(a > 0)
            E.insert(a);
    }
    int mx = 0;
    for (int i = 0; i < N; i++) {
        for (int a : W[i]) if(a > 0)
            E.insert(a);

        for (int a : W[i]) if(a < 0)
            E.erase(E.find(-a));

        mx = max(mx, *E.begin());
    }
    cout << mx << '\n';
    return 0;
}

Subtask #1

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	8 ms	12012 KB	Output is correct
2	Correct	7 ms	11980 KB	Output is correct
3	Correct	8 ms	11980 KB	Output is correct
4	Correct	7 ms	12000 KB	Output is correct
5	Correct	7 ms	11980 KB	Output is correct
6	Correct	7 ms	12072 KB	Output is correct
7	Correct	7 ms	11980 KB	Output is correct
8	Correct	7 ms	12072 KB	Output is correct
9	Correct	8 ms	11980 KB	Output is correct
10	Correct	7 ms	12056 KB	Output is correct
11	Correct	8 ms	11980 KB	Output is correct
12	Correct	7 ms	12068 KB	Output is correct
13	Correct	7 ms	12052 KB	Output is correct
14	Correct	8 ms	12076 KB	Output is correct
15	Correct	9 ms	11980 KB	Output is correct
16	Correct	8 ms	12072 KB	Output is correct
17	Correct	7 ms	11980 KB	Output is correct
18	Correct	7 ms	11980 KB	Output is correct

Subtask #2

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	8 ms	12012 KB	Output is correct
2	Correct	7 ms	11980 KB	Output is correct
3	Correct	8 ms	11980 KB	Output is correct
4	Correct	7 ms	12000 KB	Output is correct
5	Correct	7 ms	11980 KB	Output is correct
6	Correct	7 ms	12072 KB	Output is correct
7	Correct	7 ms	11980 KB	Output is correct
8	Correct	7 ms	12072 KB	Output is correct
9	Correct	8 ms	11980 KB	Output is correct
10	Correct	7 ms	12056 KB	Output is correct
11	Correct	8 ms	11980 KB	Output is correct
12	Correct	7 ms	12068 KB	Output is correct
13	Correct	7 ms	12052 KB	Output is correct
14	Correct	8 ms	12076 KB	Output is correct
15	Correct	9 ms	11980 KB	Output is correct
16	Correct	8 ms	12072 KB	Output is correct
17	Correct	7 ms	11980 KB	Output is correct
18	Correct	7 ms	11980 KB	Output is correct
19	Correct	8 ms	12068 KB	Output is correct
20	Correct	7 ms	12068 KB	Output is correct
21	Correct	10 ms	12088 KB	Output is correct
22	Correct	9 ms	12236 KB	Output is correct
23	Correct	10 ms	12284 KB	Output is correct
24	Correct	9 ms	12236 KB	Output is correct
25	Correct	9 ms	12340 KB	Output is correct
26	Correct	9 ms	12344 KB	Output is correct
27	Correct	7 ms	11980 KB	Output is correct
28	Correct	9 ms	11980 KB	Output is correct
29	Correct	7 ms	12072 KB	Output is correct
30	Correct	10 ms	12280 KB	Output is correct
31	Correct	9 ms	12364 KB	Output is correct

Subtask #3

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	7 ms	11980 KB	Output is correct
2	Correct	7 ms	12184 KB	Output is correct
3	Correct	9 ms	12332 KB	Output is correct
4	Correct	50 ms	17104 KB	Output is correct
5	Correct	158 ms	24544 KB	Output is correct
6	Correct	186 ms	27808 KB	Output is correct
7	Correct	217 ms	31028 KB	Output is correct
8	Correct	463 ms	43576 KB	Output is correct

Subtask #4

40.0 / 40.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	8 ms	12012 KB	Output is correct
2	Correct	7 ms	11980 KB	Output is correct
3	Correct	8 ms	11980 KB	Output is correct
4	Correct	7 ms	12000 KB	Output is correct
5	Correct	7 ms	11980 KB	Output is correct
6	Correct	7 ms	12072 KB	Output is correct
7	Correct	7 ms	11980 KB	Output is correct
8	Correct	7 ms	12072 KB	Output is correct
9	Correct	8 ms	11980 KB	Output is correct
10	Correct	7 ms	12056 KB	Output is correct
11	Correct	8 ms	11980 KB	Output is correct
12	Correct	7 ms	12068 KB	Output is correct
13	Correct	7 ms	12052 KB	Output is correct
14	Correct	8 ms	12076 KB	Output is correct
15	Correct	9 ms	11980 KB	Output is correct
16	Correct	8 ms	12072 KB	Output is correct
17	Correct	7 ms	11980 KB	Output is correct
18	Correct	7 ms	11980 KB	Output is correct
19	Correct	8 ms	12068 KB	Output is correct
20	Correct	7 ms	12068 KB	Output is correct
21	Correct	10 ms	12088 KB	Output is correct
22	Correct	9 ms	12236 KB	Output is correct
23	Correct	10 ms	12284 KB	Output is correct
24	Correct	9 ms	12236 KB	Output is correct
25	Correct	9 ms	12340 KB	Output is correct
26	Correct	9 ms	12344 KB	Output is correct
27	Correct	7 ms	11980 KB	Output is correct
28	Correct	9 ms	11980 KB	Output is correct
29	Correct	7 ms	12072 KB	Output is correct
30	Correct	10 ms	12280 KB	Output is correct
31	Correct	9 ms	12364 KB	Output is correct
32	Correct	7 ms	11980 KB	Output is correct
33	Correct	7 ms	12184 KB	Output is correct
34	Correct	9 ms	12332 KB	Output is correct
35	Correct	50 ms	17104 KB	Output is correct
36	Correct	158 ms	24544 KB	Output is correct
37	Correct	186 ms	27808 KB	Output is correct
38	Correct	217 ms	31028 KB	Output is correct
39	Correct	463 ms	43576 KB	Output is correct
40	Correct	12 ms	12620 KB	Output is correct
41	Correct	22 ms	13296 KB	Output is correct
42	Correct	23 ms	13852 KB	Output is correct
43	Correct	139 ms	24580 KB	Output is correct
44	Correct	410 ms	43572 KB	Output is correct
45	Correct	68 ms	18244 KB	Output is correct
46	Correct	200 ms	30940 KB	Output is correct
47	Correct	396 ms	43568 KB	Output is correct
48	Correct	360 ms	43844 KB	Output is correct
49	Correct	304 ms	42932 KB	Output is correct
50	Correct	331 ms	43016 KB	Output is correct