답안 #104610

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
104610	2019-04-08T10:48:41 Z	alexpetrescu	Hacker (BOI15_hac)	C++14	100 / 100	105 ms	7800 KB

hac

#include <cstdio>
#include <algorithm>

//FILE *fin = fopen("a.in", "r"), *fout = fopen("a.out", "w");
#define fin stdin
#define fout stdout

#define MAXN 500009

int v[2 * MAXN], dq[MAXN], sum[MAXN];

int main() {
    int n;
    fscanf(fin, "%d", &n);

    for (int i = 1; i <= n; i++)
        fscanf(fin, "%d", &v[i]);

    for (int i = 1; i <= n; i++)
        sum[i] = sum[i - 1] + v[i];

    int l = n / 2;
    for (int i = 1; i < l; i++)
        v[i] = sum[i] + sum[n] - sum[n - l + i];
    for (int i = l; i <= n; i++)
        v[i] = sum[i] - sum[i - l];
    for (int i = n + 1; i <= 2 * n; i++)
        v[i] = v[i - n];

    int st = 0, dr = 0, ans = 0;
    for (int i = 1; i <= 2 * n; i++) {
        if (st < dr && i - dq[st] == n - l)
            st++;
        while (st < dr && v[i] >= v[dq[dr - 1]])
            dr--;
        dq[dr++] = i;
        if (i >= n - l)
            ans = std::max(ans, sum[n] - v[dq[st]]);
    }

    fprintf(fout, "%d\n", ans);

    fclose(fin);
    fclose(fout);
    return 0;
}

Compilation message

hac.cpp: In function 'int main()':
hac.cpp:14:11: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     fscanf(fin, "%d", &n);
     ~~~~~~^~~~~~~~~~~~~~~
hac.cpp:17:15: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         fscanf(fin, "%d", &v[i]);
         ~~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1

20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	256 KB	Output is correct
2	Correct	2 ms	384 KB	Output is correct
3	Correct	2 ms	256 KB	Output is correct
4	Correct	2 ms	256 KB	Output is correct
5	Correct	2 ms	256 KB	Output is correct
6	Correct	2 ms	256 KB	Output is correct
7	Correct	2 ms	512 KB	Output is correct
8	Correct	2 ms	256 KB	Output is correct
9	Correct	2 ms	256 KB	Output is correct
10	Correct	2 ms	384 KB	Output is correct
11	Correct	2 ms	384 KB	Output is correct
12	Correct	2 ms	384 KB	Output is correct
13	Correct	2 ms	256 KB	Output is correct
14	Correct	2 ms	384 KB	Output is correct
15	Correct	0 ms	256 KB	Output is correct
16	Correct	2 ms	256 KB	Output is correct
17	Correct	2 ms	256 KB	Output is correct
18	Correct	2 ms	256 KB	Output is correct

Subtask #2

20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	256 KB	Output is correct
2	Correct	2 ms	384 KB	Output is correct
3	Correct	2 ms	256 KB	Output is correct
4	Correct	2 ms	256 KB	Output is correct
5	Correct	2 ms	256 KB	Output is correct
6	Correct	2 ms	256 KB	Output is correct
7	Correct	2 ms	512 KB	Output is correct
8	Correct	2 ms	256 KB	Output is correct
9	Correct	2 ms	256 KB	Output is correct
10	Correct	2 ms	384 KB	Output is correct
11	Correct	2 ms	384 KB	Output is correct
12	Correct	2 ms	384 KB	Output is correct
13	Correct	2 ms	256 KB	Output is correct
14	Correct	2 ms	384 KB	Output is correct
15	Correct	0 ms	256 KB	Output is correct
16	Correct	2 ms	256 KB	Output is correct
17	Correct	2 ms	256 KB	Output is correct
18	Correct	2 ms	256 KB	Output is correct
19	Correct	3 ms	384 KB	Output is correct
20	Correct	2 ms	384 KB	Output is correct
21	Correct	2 ms	384 KB	Output is correct
22	Correct	3 ms	384 KB	Output is correct
23	Correct	3 ms	384 KB	Output is correct
24	Correct	2 ms	384 KB	Output is correct
25	Correct	3 ms	384 KB	Output is correct
26	Correct	3 ms	384 KB	Output is correct
27	Correct	2 ms	256 KB	Output is correct
28	Correct	2 ms	384 KB	Output is correct
29	Correct	2 ms	384 KB	Output is correct
30	Correct	3 ms	384 KB	Output is correct
31	Correct	3 ms	384 KB	Output is correct

Subtask #3

20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	256 KB	Output is correct
2	Correct	2 ms	384 KB	Output is correct
3	Correct	3 ms	384 KB	Output is correct
4	Correct	16 ms	1272 KB	Output is correct
5	Correct	29 ms	2808 KB	Output is correct
6	Correct	44 ms	3520 KB	Output is correct
7	Correct	50 ms	4004 KB	Output is correct
8	Correct	80 ms	6264 KB	Output is correct

Subtask #4

40.0 / 40.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	256 KB	Output is correct
2	Correct	2 ms	384 KB	Output is correct
3	Correct	2 ms	256 KB	Output is correct
4	Correct	2 ms	256 KB	Output is correct
5	Correct	2 ms	256 KB	Output is correct
6	Correct	2 ms	256 KB	Output is correct
7	Correct	2 ms	512 KB	Output is correct
8	Correct	2 ms	256 KB	Output is correct
9	Correct	2 ms	256 KB	Output is correct
10	Correct	2 ms	384 KB	Output is correct
11	Correct	2 ms	384 KB	Output is correct
12	Correct	2 ms	384 KB	Output is correct
13	Correct	2 ms	256 KB	Output is correct
14	Correct	2 ms	384 KB	Output is correct
15	Correct	0 ms	256 KB	Output is correct
16	Correct	2 ms	256 KB	Output is correct
17	Correct	2 ms	256 KB	Output is correct
18	Correct	2 ms	256 KB	Output is correct
19	Correct	3 ms	384 KB	Output is correct
20	Correct	2 ms	384 KB	Output is correct
21	Correct	2 ms	384 KB	Output is correct
22	Correct	3 ms	384 KB	Output is correct
23	Correct	3 ms	384 KB	Output is correct
24	Correct	2 ms	384 KB	Output is correct
25	Correct	3 ms	384 KB	Output is correct
26	Correct	3 ms	384 KB	Output is correct
27	Correct	2 ms	256 KB	Output is correct
28	Correct	2 ms	384 KB	Output is correct
29	Correct	2 ms	384 KB	Output is correct
30	Correct	3 ms	384 KB	Output is correct
31	Correct	3 ms	384 KB	Output is correct
32	Correct	2 ms	256 KB	Output is correct
33	Correct	2 ms	384 KB	Output is correct
34	Correct	3 ms	384 KB	Output is correct
35	Correct	16 ms	1272 KB	Output is correct
36	Correct	29 ms	2808 KB	Output is correct
37	Correct	44 ms	3520 KB	Output is correct
38	Correct	50 ms	4004 KB	Output is correct
39	Correct	80 ms	6264 KB	Output is correct
40	Correct	4 ms	640 KB	Output is correct
41	Correct	7 ms	640 KB	Output is correct
42	Correct	7 ms	768 KB	Output is correct
43	Correct	31 ms	2808 KB	Output is correct
44	Correct	82 ms	6292 KB	Output is correct
45	Correct	17 ms	1636 KB	Output is correct
46	Correct	56 ms	3960 KB	Output is correct
47	Correct	105 ms	6264 KB	Output is correct
48	Correct	58 ms	6264 KB	Output is correct
49	Correct	81 ms	7800 KB	Output is correct
50	Correct	71 ms	7800 KB	Output is correct