답안 #30489 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
30489	2017-07-24T00:03:01 Z	sampriti	Hacker (BOI15_hac)	C++14	100 / 100	766 ms	18784 KB

#include <cstdio>
#include <algorithm>
#include <set>

using namespace std;

int N;
int A[500000];
int P[500000];
int sum[500000];  // sum[i..(i+len)]
multiset<int> S;

int query(int i, int j) {
  if(i > j) {
    return query(i, N - 1) + query(0, j);
  }

  if(i == 0) return P[j];
  return P[j] - P[i - 1];
}

int main() {
  scanf("%d", &N);

  for(int i = 0; i < N; i++) scanf("%d", &A[i]);
  P[0] = A[0];
  for(int i = 1; i < N; i++) P[i] = P[i - 1] + A[i];

  int len = (N + 1)/2;
  for(int i = 0; i < N; i++) {
    sum[i] = query(i, (i + len - 1) % N);
  }

  int ans = 0;

  int L = 0 - (len - 1) + N, R = 0;
  int j = L;
  while(j != 1) {
    S.insert(sum[j]);
    j = (j + 1) % N;
  }

  for(int i = 0; i < N; i++) {
    ans = max(ans, *S.begin());
    S.erase(S.find(sum[L]));
    L = (L + 1) % N;
    R = (R + 1) % N;
    S.insert(sum[R]);
  }

  printf("%d\n", ans);
}

Compilation message

hac.cpp: In function 'int main()':
hac.cpp:23:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &N);
                  ^
hac.cpp:25:48: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   for(int i = 0; i < N; i++) scanf("%d", &A[i]);
                                                ^

Subtask #1
20.0 / 20.0

#	결과	메모리	Grader output
1	Correct	7036 KB	Output is correct
2	Correct	7036 KB	Output is correct
3	Correct	7036 KB	Output is correct
4	Correct	7036 KB	Output is correct
5	Correct	7036 KB	Output is correct
6	Correct	7036 KB	Output is correct
7	Correct	7036 KB	Output is correct
8	Correct	7036 KB	Output is correct
9	Correct	7036 KB	Output is correct
10	Correct	7036 KB	Output is correct
11	Correct	7036 KB	Output is correct
12	Correct	7036 KB	Output is correct
13	Correct	7036 KB	Output is correct
14	Correct	7036 KB	Output is correct
15	Correct	7036 KB	Output is correct
16	Correct	7036 KB	Output is correct
17	Correct	7036 KB	Output is correct
18	Correct	7036 KB	Output is correct

Subtask #2
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	7036 KB	Output is correct
2	Correct	0 ms	7036 KB	Output is correct
3	Correct	0 ms	7036 KB	Output is correct
4	Correct	0 ms	7036 KB	Output is correct
5	Correct	0 ms	7036 KB	Output is correct
6	Correct	0 ms	7036 KB	Output is correct
7	Correct	0 ms	7036 KB	Output is correct
8	Correct	0 ms	7036 KB	Output is correct
9	Correct	0 ms	7036 KB	Output is correct
10	Correct	0 ms	7036 KB	Output is correct
11	Correct	0 ms	7036 KB	Output is correct
12	Correct	0 ms	7036 KB	Output is correct
13	Correct	0 ms	7036 KB	Output is correct
14	Correct	0 ms	7036 KB	Output is correct
15	Correct	0 ms	7036 KB	Output is correct
16	Correct	0 ms	7036 KB	Output is correct
17	Correct	0 ms	7036 KB	Output is correct
18	Correct	0 ms	7036 KB	Output is correct
19	Correct	0 ms	7036 KB	Output is correct
20	Correct	0 ms	7036 KB	Output is correct
21	Correct	0 ms	7036 KB	Output is correct
22	Correct	0 ms	7168 KB	Output is correct
23	Correct	3 ms	7168 KB	Output is correct
24	Correct	0 ms	7168 KB	Output is correct
25	Correct	3 ms	7168 KB	Output is correct
26	Correct	3 ms	7168 KB	Output is correct
27	Correct	0 ms	7036 KB	Output is correct
28	Correct	0 ms	7036 KB	Output is correct
29	Correct	0 ms	7036 KB	Output is correct
30	Correct	0 ms	7168 KB	Output is correct
31	Correct	3 ms	7168 KB	Output is correct

Subtask #3
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	7036 KB	Output is correct
2	Correct	0 ms	7036 KB	Output is correct
3	Correct	3 ms	7168 KB	Output is correct
4	Correct	59 ms	8884 KB	Output is correct
5	Correct	203 ms	11788 KB	Output is correct
6	Correct	286 ms	12976 KB	Output is correct
7	Correct	296 ms	14032 KB	Output is correct
8	Correct	766 ms	18784 KB	Output is correct

Subtask #4
40.0 / 40.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	7036 KB	Output is correct
2	Correct	0 ms	7036 KB	Output is correct
3	Correct	0 ms	7036 KB	Output is correct
4	Correct	0 ms	7036 KB	Output is correct
5	Correct	0 ms	7036 KB	Output is correct
6	Correct	0 ms	7036 KB	Output is correct
7	Correct	0 ms	7036 KB	Output is correct
8	Correct	0 ms	7036 KB	Output is correct
9	Correct	0 ms	7036 KB	Output is correct
10	Correct	0 ms	7036 KB	Output is correct
11	Correct	0 ms	7036 KB	Output is correct
12	Correct	0 ms	7036 KB	Output is correct
13	Correct	0 ms	7036 KB	Output is correct
14	Correct	0 ms	7036 KB	Output is correct
15	Correct	0 ms	7036 KB	Output is correct
16	Correct	0 ms	7036 KB	Output is correct
17	Correct	0 ms	7036 KB	Output is correct
18	Correct	0 ms	7036 KB	Output is correct
19	Correct	0 ms	7036 KB	Output is correct
20	Correct	0 ms	7036 KB	Output is correct
21	Correct	0 ms	7036 KB	Output is correct
22	Correct	0 ms	7168 KB	Output is correct
23	Correct	3 ms	7168 KB	Output is correct
24	Correct	0 ms	7168 KB	Output is correct
25	Correct	3 ms	7168 KB	Output is correct
26	Correct	3 ms	7168 KB	Output is correct
27	Correct	0 ms	7036 KB	Output is correct
28	Correct	0 ms	7036 KB	Output is correct
29	Correct	0 ms	7036 KB	Output is correct
30	Correct	0 ms	7168 KB	Output is correct
31	Correct	3 ms	7168 KB	Output is correct
32	Correct	0 ms	7036 KB	Output is correct
33	Correct	0 ms	7036 KB	Output is correct
34	Correct	3 ms	7168 KB	Output is correct
35	Correct	59 ms	8884 KB	Output is correct
36	Correct	203 ms	11788 KB	Output is correct
37	Correct	286 ms	12976 KB	Output is correct
38	Correct	296 ms	14032 KB	Output is correct
39	Correct	766 ms	18784 KB	Output is correct
40	Correct	6 ms	7300 KB	Output is correct
41	Correct	6 ms	7564 KB	Output is correct
42	Correct	16 ms	7696 KB	Output is correct
43	Correct	226 ms	11788 KB	Output is correct
44	Correct	496 ms	18784 KB	Output is correct
45	Correct	99 ms	9412 KB	Output is correct
46	Correct	306 ms	14032 KB	Output is correct
47	Correct	673 ms	18784 KB	Output is correct
48	Correct	369 ms	18784 KB	Output is correct
49	Correct	326 ms	18784 KB	Output is correct
50	Correct	333 ms	18784 KB	Output is correct

답안 #30489

Compilation message

Subtask #1 20.0 / 20.0

Subtask #2 20.0 / 20.0

Subtask #3 20.0 / 20.0

Subtask #4 40.0 / 40.0

Subtask #1
20.0 / 20.0

Subtask #2
20.0 / 20.0

Subtask #3
20.0 / 20.0

Subtask #4
40.0 / 40.0