답안 #500054

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
500054	2021-12-30T09:54:57 Z	RedBoy	Bigger segments (IZhO19_segments)	C++11	100 / 100	82 ms	13080 KB

segments

#include <iostream>

using namespace std;

const int N = 5e5 + 5;

int n;
long long s[N];
pair<int, int> dp[N];

bool check(int mid, int index)
{
    return s[mid] >= 2 * s[index] - s[dp[index].second - 1];
}

int binarySearch(int index)
{
    int l = index + 1, r = n;
    while(l < r)
    {
        int mid = (l + r) / 2;
        if(check(mid, index))
            r = mid;
        else
            l = mid + 1;
    }

    return (check(l, index) ? l : -1);
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    cin >> n;
    for(int i = 1; i <= n; i++)
    {
        int x;
        cin >> x;
        s[i] = x + s[i - 1];
    }

    dp[1] = {1, 1};
    for(int i = 1; i <= n; i++)
    {
        dp[i + 1] = max(dp[i + 1], dp[i]);

        int x = binarySearch(i);
        if(x != -1)
            dp[x] = max(dp[x], {dp[i].first + 1, i + 1});
    }

    cout << dp[n].first << '\n';

    return 0;
}

Subtask #1
13.0 / 13.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	0 ms	204 KB	Output is correct
4	Correct	0 ms	316 KB	Output is correct
5	Correct	0 ms	320 KB	Output is correct
6	Correct	0 ms	204 KB	Output is correct
7	Correct	1 ms	320 KB	Output is correct
8	Correct	0 ms	204 KB	Output is correct
9	Correct	1 ms	332 KB	Output is correct
10	Correct	0 ms	332 KB	Output is correct
11	Correct	0 ms	332 KB	Output is correct
12	Correct	0 ms	204 KB	Output is correct
13	Correct	0 ms	204 KB	Output is correct
14	Correct	0 ms	204 KB	Output is correct
15	Correct	0 ms	320 KB	Output is correct

Subtask #2
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	0 ms	204 KB	Output is correct
4	Correct	0 ms	316 KB	Output is correct
5	Correct	0 ms	320 KB	Output is correct
6	Correct	0 ms	204 KB	Output is correct
7	Correct	1 ms	320 KB	Output is correct
8	Correct	0 ms	204 KB	Output is correct
9	Correct	1 ms	332 KB	Output is correct
10	Correct	0 ms	332 KB	Output is correct
11	Correct	0 ms	332 KB	Output is correct
12	Correct	0 ms	204 KB	Output is correct
13	Correct	0 ms	204 KB	Output is correct
14	Correct	0 ms	204 KB	Output is correct
15	Correct	0 ms	320 KB	Output is correct
16	Correct	0 ms	320 KB	Output is correct
17	Correct	1 ms	332 KB	Output is correct
18	Correct	1 ms	332 KB	Output is correct
19	Correct	1 ms	320 KB	Output is correct
20	Correct	0 ms	332 KB	Output is correct
21	Correct	1 ms	332 KB	Output is correct
22	Correct	1 ms	332 KB	Output is correct
23	Correct	0 ms	332 KB	Output is correct
24	Correct	0 ms	332 KB	Output is correct
25	Correct	1 ms	332 KB	Output is correct
26	Correct	0 ms	332 KB	Output is correct
27	Correct	1 ms	332 KB	Output is correct
28	Correct	0 ms	332 KB	Output is correct
29	Correct	0 ms	332 KB	Output is correct
30	Correct	1 ms	332 KB	Output is correct

Subtask #3
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	0 ms	204 KB	Output is correct
4	Correct	0 ms	316 KB	Output is correct
5	Correct	0 ms	320 KB	Output is correct
6	Correct	0 ms	204 KB	Output is correct
7	Correct	1 ms	320 KB	Output is correct
8	Correct	0 ms	204 KB	Output is correct
9	Correct	1 ms	332 KB	Output is correct
10	Correct	0 ms	332 KB	Output is correct
11	Correct	0 ms	332 KB	Output is correct
12	Correct	0 ms	204 KB	Output is correct
13	Correct	0 ms	204 KB	Output is correct
14	Correct	0 ms	204 KB	Output is correct
15	Correct	0 ms	320 KB	Output is correct
16	Correct	0 ms	320 KB	Output is correct
17	Correct	1 ms	332 KB	Output is correct
18	Correct	1 ms	332 KB	Output is correct
19	Correct	1 ms	320 KB	Output is correct
20	Correct	0 ms	332 KB	Output is correct
21	Correct	1 ms	332 KB	Output is correct
22	Correct	1 ms	332 KB	Output is correct
23	Correct	0 ms	332 KB	Output is correct
24	Correct	0 ms	332 KB	Output is correct
25	Correct	1 ms	332 KB	Output is correct
26	Correct	0 ms	332 KB	Output is correct
27	Correct	1 ms	332 KB	Output is correct
28	Correct	0 ms	332 KB	Output is correct
29	Correct	0 ms	332 KB	Output is correct
30	Correct	1 ms	332 KB	Output is correct
31	Correct	1 ms	332 KB	Output is correct
32	Correct	1 ms	328 KB	Output is correct
33	Correct	1 ms	332 KB	Output is correct
34	Correct	1 ms	328 KB	Output is correct
35	Correct	1 ms	336 KB	Output is correct
36	Correct	1 ms	332 KB	Output is correct
37	Correct	1 ms	332 KB	Output is correct
38	Correct	1 ms	332 KB	Output is correct
39	Correct	1 ms	332 KB	Output is correct
40	Correct	1 ms	332 KB	Output is correct
41	Correct	0 ms	332 KB	Output is correct
42	Correct	1 ms	332 KB	Output is correct
43	Correct	1 ms	332 KB	Output is correct
44	Correct	1 ms	332 KB	Output is correct
45	Correct	1 ms	332 KB	Output is correct

Subtask #4
36.0 / 36.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	0 ms	204 KB	Output is correct
4	Correct	0 ms	316 KB	Output is correct
5	Correct	0 ms	320 KB	Output is correct
6	Correct	0 ms	204 KB	Output is correct
7	Correct	1 ms	320 KB	Output is correct
8	Correct	0 ms	204 KB	Output is correct
9	Correct	1 ms	332 KB	Output is correct
10	Correct	0 ms	332 KB	Output is correct
11	Correct	0 ms	332 KB	Output is correct
12	Correct	0 ms	204 KB	Output is correct
13	Correct	0 ms	204 KB	Output is correct
14	Correct	0 ms	204 KB	Output is correct
15	Correct	0 ms	320 KB	Output is correct
16	Correct	0 ms	320 KB	Output is correct
17	Correct	1 ms	332 KB	Output is correct
18	Correct	1 ms	332 KB	Output is correct
19	Correct	1 ms	320 KB	Output is correct
20	Correct	0 ms	332 KB	Output is correct
21	Correct	1 ms	332 KB	Output is correct
22	Correct	1 ms	332 KB	Output is correct
23	Correct	0 ms	332 KB	Output is correct
24	Correct	0 ms	332 KB	Output is correct
25	Correct	1 ms	332 KB	Output is correct
26	Correct	0 ms	332 KB	Output is correct
27	Correct	1 ms	332 KB	Output is correct
28	Correct	0 ms	332 KB	Output is correct
29	Correct	0 ms	332 KB	Output is correct
30	Correct	1 ms	332 KB	Output is correct
31	Correct	1 ms	332 KB	Output is correct
32	Correct	1 ms	328 KB	Output is correct
33	Correct	1 ms	332 KB	Output is correct
34	Correct	1 ms	328 KB	Output is correct
35	Correct	1 ms	336 KB	Output is correct
36	Correct	1 ms	332 KB	Output is correct
37	Correct	1 ms	332 KB	Output is correct
38	Correct	1 ms	332 KB	Output is correct
39	Correct	1 ms	332 KB	Output is correct
40	Correct	1 ms	332 KB	Output is correct
41	Correct	0 ms	332 KB	Output is correct
42	Correct	1 ms	332 KB	Output is correct
43	Correct	1 ms	332 KB	Output is correct
44	Correct	1 ms	332 KB	Output is correct
45	Correct	1 ms	332 KB	Output is correct
46	Correct	11 ms	2252 KB	Output is correct
47	Correct	13 ms	2340 KB	Output is correct
48	Correct	14 ms	2572 KB	Output is correct
49	Correct	13 ms	2756 KB	Output is correct
50	Correct	13 ms	2848 KB	Output is correct
51	Correct	17 ms	2844 KB	Output is correct
52	Correct	8 ms	1504 KB	Output is correct
53	Correct	5 ms	972 KB	Output is correct
54	Correct	11 ms	2092 KB	Output is correct
55	Correct	18 ms	2756 KB	Output is correct
56	Correct	9 ms	2264 KB	Output is correct
57	Correct	10 ms	2244 KB	Output is correct
58	Correct	10 ms	2340 KB	Output is correct
59	Correct	11 ms	2376 KB	Output is correct
60	Correct	11 ms	2372 KB	Output is correct

Subtask #5
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	0 ms	204 KB	Output is correct
4	Correct	0 ms	316 KB	Output is correct
5	Correct	0 ms	320 KB	Output is correct
6	Correct	0 ms	204 KB	Output is correct
7	Correct	1 ms	320 KB	Output is correct
8	Correct	0 ms	204 KB	Output is correct
9	Correct	1 ms	332 KB	Output is correct
10	Correct	0 ms	332 KB	Output is correct
11	Correct	0 ms	332 KB	Output is correct
12	Correct	0 ms	204 KB	Output is correct
13	Correct	0 ms	204 KB	Output is correct
14	Correct	0 ms	204 KB	Output is correct
15	Correct	0 ms	320 KB	Output is correct
16	Correct	0 ms	320 KB	Output is correct
17	Correct	1 ms	332 KB	Output is correct
18	Correct	1 ms	332 KB	Output is correct
19	Correct	1 ms	320 KB	Output is correct
20	Correct	0 ms	332 KB	Output is correct
21	Correct	1 ms	332 KB	Output is correct
22	Correct	1 ms	332 KB	Output is correct
23	Correct	0 ms	332 KB	Output is correct
24	Correct	0 ms	332 KB	Output is correct
25	Correct	1 ms	332 KB	Output is correct
26	Correct	0 ms	332 KB	Output is correct
27	Correct	1 ms	332 KB	Output is correct
28	Correct	0 ms	332 KB	Output is correct
29	Correct	0 ms	332 KB	Output is correct
30	Correct	1 ms	332 KB	Output is correct
31	Correct	1 ms	332 KB	Output is correct
32	Correct	1 ms	328 KB	Output is correct
33	Correct	1 ms	332 KB	Output is correct
34	Correct	1 ms	328 KB	Output is correct
35	Correct	1 ms	336 KB	Output is correct
36	Correct	1 ms	332 KB	Output is correct
37	Correct	1 ms	332 KB	Output is correct
38	Correct	1 ms	332 KB	Output is correct
39	Correct	1 ms	332 KB	Output is correct
40	Correct	1 ms	332 KB	Output is correct
41	Correct	0 ms	332 KB	Output is correct
42	Correct	1 ms	332 KB	Output is correct
43	Correct	1 ms	332 KB	Output is correct
44	Correct	1 ms	332 KB	Output is correct
45	Correct	1 ms	332 KB	Output is correct
46	Correct	11 ms	2252 KB	Output is correct
47	Correct	13 ms	2340 KB	Output is correct
48	Correct	14 ms	2572 KB	Output is correct
49	Correct	13 ms	2756 KB	Output is correct
50	Correct	13 ms	2848 KB	Output is correct
51	Correct	17 ms	2844 KB	Output is correct
52	Correct	8 ms	1504 KB	Output is correct
53	Correct	5 ms	972 KB	Output is correct
54	Correct	11 ms	2092 KB	Output is correct
55	Correct	18 ms	2756 KB	Output is correct
56	Correct	9 ms	2264 KB	Output is correct
57	Correct	10 ms	2244 KB	Output is correct
58	Correct	10 ms	2340 KB	Output is correct
59	Correct	11 ms	2376 KB	Output is correct
60	Correct	11 ms	2372 KB	Output is correct
61	Correct	60 ms	10020 KB	Output is correct
62	Correct	65 ms	10036 KB	Output is correct
63	Correct	65 ms	10456 KB	Output is correct
64	Correct	70 ms	12644 KB	Output is correct
65	Correct	62 ms	12996 KB	Output is correct
66	Correct	82 ms	12896 KB	Output is correct
67	Correct	60 ms	10312 KB	Output is correct
68	Correct	30 ms	5276 KB	Output is correct
69	Correct	55 ms	9132 KB	Output is correct
70	Correct	71 ms	13080 KB	Output is correct
71	Correct	43 ms	10064 KB	Output is correct
72	Correct	53 ms	10432 KB	Output is correct
73	Correct	56 ms	11016 KB	Output is correct
74	Correct	56 ms	11324 KB	Output is correct
75	Correct	54 ms	11432 KB	Output is correct

답안 #500054

Compilation message

Subtask #1 13.0 / 13.0

Subtask #2 14.0 / 14.0

Subtask #3 10.0 / 10.0

Subtask #4 36.0 / 36.0

Subtask #5 27.0 / 27.0

Subtask #1
13.0 / 13.0

Subtask #2
14.0 / 14.0

Subtask #3
10.0 / 10.0

Subtask #4
36.0 / 36.0

Subtask #5
27.0 / 27.0