답안 #209766

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
209766	2020-03-15T14:00:48 Z	Alexa2001	Mountains (NOI20_mountains)	C++17	100 / 100	140 ms	8728 KB

Mountains

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
const int Nmax = 3e5 + 5;

ll ans[Nmax], h[Nmax];
int a[Nmax];
int n;

class AIB
{
    int ub(int x)
    {
        return (x&(-x));
    }
    int a[Nmax];

public:
    void update(int x)
    {
        for(; x<=n; x+=ub(x)) a[x]++;
    }
    int query(int x)
    {
        int ans = 0;
        for(; x; x-=ub(x)) ans += a[x];
        return ans;
    }
    void clear()
    {
        memset(a, 0, sizeof(a));
    }
} aib;

int main()
{
  //  freopen("input", "r", stdin);
    cin.sync_with_stdio(false); cin.tie(0);

    cin >> n;

    int i;
    vector<int> ord;

    for(i=1; i<=n; ++i)
    {
        cin >> h[i];
        ord.push_back(i);
    }

    sort(ord.begin(), ord.end(), [](int x, int y) { return h[x] < h[y]; });

    int nr = 0;
    for(i=0; i<n; ++i)
    {
        if(!i || h[ord[i]] != h[ord[i-1]]) ++nr;
        a[ord[i]] = nr;
    }

    for(i=1; i<=n; ++i)
    {
        ans[i] = aib.query(a[i]-1);
        aib.update(a[i]);
    }

    aib.clear();
    for(i=n; i; --i)
    {
        ans[i] *= aib.query(a[i]-1);
        aib.update(a[i]);
    }

    ll sum = 0;
    for(i=1; i<=n; ++i) sum += ans[i];
    cout << sum << '\n';

    return 0;
}

Subtask #1
2.0 / 2.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	1528 KB	Output is correct
2	Correct	100 ms	8680 KB	Output is correct
3	Correct	106 ms	8680 KB	Output is correct
4	Correct	116 ms	8680 KB	Output is correct
5	Correct	103 ms	8680 KB	Output is correct
6	Correct	99 ms	8680 KB	Output is correct
7	Correct	102 ms	8680 KB	Output is correct
8	Correct	98 ms	8676 KB	Output is correct
9	Correct	104 ms	8672 KB	Output is correct
10	Correct	103 ms	8684 KB	Output is correct

Subtask #2
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	63 ms	8676 KB	Output is correct
2	Correct	60 ms	8680 KB	Output is correct
3	Correct	61 ms	8680 KB	Output is correct
4	Correct	61 ms	8684 KB	Output is correct
5	Correct	65 ms	8684 KB	Output is correct
6	Correct	59 ms	8680 KB	Output is correct
7	Correct	61 ms	8680 KB	Output is correct
8	Correct	59 ms	8680 KB	Output is correct
9	Correct	57 ms	8680 KB	Output is correct
10	Correct	5 ms	1528 KB	Output is correct

Subtask #3
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	63 ms	8676 KB	Output is correct
2	Correct	60 ms	8680 KB	Output is correct
3	Correct	61 ms	8680 KB	Output is correct
4	Correct	61 ms	8684 KB	Output is correct
5	Correct	65 ms	8684 KB	Output is correct
6	Correct	59 ms	8680 KB	Output is correct
7	Correct	61 ms	8680 KB	Output is correct
8	Correct	59 ms	8680 KB	Output is correct
9	Correct	57 ms	8680 KB	Output is correct
10	Correct	5 ms	1528 KB	Output is correct
11	Correct	78 ms	8680 KB	Output is correct
12	Correct	74 ms	8684 KB	Output is correct
13	Correct	72 ms	8680 KB	Output is correct
14	Correct	71 ms	8680 KB	Output is correct
15	Correct	75 ms	8680 KB	Output is correct
16	Correct	74 ms	8680 KB	Output is correct
17	Correct	73 ms	8680 KB	Output is correct
18	Correct	61 ms	8680 KB	Output is correct
19	Correct	56 ms	8680 KB	Output is correct
20	Correct	5 ms	1528 KB	Output is correct

Subtask #4
36.0 / 36.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	1532 KB	Output is correct
2	Correct	5 ms	1528 KB	Output is correct
3	Correct	5 ms	1528 KB	Output is correct
4	Correct	6 ms	1528 KB	Output is correct
5	Correct	5 ms	1528 KB	Output is correct
6	Correct	6 ms	1528 KB	Output is correct
7	Correct	5 ms	1528 KB	Output is correct
8	Correct	5 ms	1528 KB	Output is correct
9	Correct	6 ms	1528 KB	Output is correct
10	Correct	6 ms	1528 KB	Output is correct

Subtask #5
28.0 / 28.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	1532 KB	Output is correct
2	Correct	5 ms	1528 KB	Output is correct
3	Correct	5 ms	1528 KB	Output is correct
4	Correct	6 ms	1528 KB	Output is correct
5	Correct	5 ms	1528 KB	Output is correct
6	Correct	6 ms	1528 KB	Output is correct
7	Correct	5 ms	1528 KB	Output is correct
8	Correct	5 ms	1528 KB	Output is correct
9	Correct	6 ms	1528 KB	Output is correct
10	Correct	6 ms	1528 KB	Output is correct
11	Correct	10 ms	1912 KB	Output is correct
12	Correct	9 ms	1912 KB	Output is correct
13	Correct	9 ms	1784 KB	Output is correct
14	Correct	9 ms	1784 KB	Output is correct
15	Correct	9 ms	1784 KB	Output is correct
16	Correct	9 ms	1784 KB	Output is correct
17	Correct	9 ms	1784 KB	Output is correct
18	Correct	9 ms	1784 KB	Output is correct
19	Correct	8 ms	1784 KB	Output is correct
20	Correct	5 ms	1528 KB	Output is correct

Subtask #6
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	63 ms	8676 KB	Output is correct
2	Correct	60 ms	8680 KB	Output is correct
3	Correct	61 ms	8680 KB	Output is correct
4	Correct	61 ms	8684 KB	Output is correct
5	Correct	65 ms	8684 KB	Output is correct
6	Correct	59 ms	8680 KB	Output is correct
7	Correct	61 ms	8680 KB	Output is correct
8	Correct	59 ms	8680 KB	Output is correct
9	Correct	57 ms	8680 KB	Output is correct
10	Correct	5 ms	1528 KB	Output is correct
11	Correct	78 ms	8680 KB	Output is correct
12	Correct	74 ms	8684 KB	Output is correct
13	Correct	72 ms	8680 KB	Output is correct
14	Correct	71 ms	8680 KB	Output is correct
15	Correct	75 ms	8680 KB	Output is correct
16	Correct	74 ms	8680 KB	Output is correct
17	Correct	73 ms	8680 KB	Output is correct
18	Correct	61 ms	8680 KB	Output is correct
19	Correct	56 ms	8680 KB	Output is correct
20	Correct	5 ms	1528 KB	Output is correct
21	Correct	106 ms	8680 KB	Output is correct
22	Correct	101 ms	8676 KB	Output is correct
23	Correct	101 ms	8680 KB	Output is correct
24	Correct	100 ms	8680 KB	Output is correct
25	Correct	103 ms	8680 KB	Output is correct
26	Correct	104 ms	8728 KB	Output is correct
27	Correct	105 ms	8680 KB	Output is correct
28	Correct	70 ms	8680 KB	Output is correct
29	Correct	74 ms	8680 KB	Output is correct
30	Correct	5 ms	1528 KB	Output is correct

Subtask #7
12.0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	1528 KB	Output is correct
2	Correct	100 ms	8680 KB	Output is correct
3	Correct	106 ms	8680 KB	Output is correct
4	Correct	116 ms	8680 KB	Output is correct
5	Correct	103 ms	8680 KB	Output is correct
6	Correct	99 ms	8680 KB	Output is correct
7	Correct	102 ms	8680 KB	Output is correct
8	Correct	98 ms	8676 KB	Output is correct
9	Correct	104 ms	8672 KB	Output is correct
10	Correct	103 ms	8684 KB	Output is correct
11	Correct	63 ms	8676 KB	Output is correct
12	Correct	60 ms	8680 KB	Output is correct
13	Correct	61 ms	8680 KB	Output is correct
14	Correct	61 ms	8684 KB	Output is correct
15	Correct	65 ms	8684 KB	Output is correct
16	Correct	59 ms	8680 KB	Output is correct
17	Correct	61 ms	8680 KB	Output is correct
18	Correct	59 ms	8680 KB	Output is correct
19	Correct	57 ms	8680 KB	Output is correct
20	Correct	5 ms	1528 KB	Output is correct
21	Correct	78 ms	8680 KB	Output is correct
22	Correct	74 ms	8684 KB	Output is correct
23	Correct	72 ms	8680 KB	Output is correct
24	Correct	71 ms	8680 KB	Output is correct
25	Correct	75 ms	8680 KB	Output is correct
26	Correct	74 ms	8680 KB	Output is correct
27	Correct	73 ms	8680 KB	Output is correct
28	Correct	61 ms	8680 KB	Output is correct
29	Correct	56 ms	8680 KB	Output is correct
30	Correct	5 ms	1528 KB	Output is correct
31	Correct	6 ms	1532 KB	Output is correct
32	Correct	5 ms	1528 KB	Output is correct
33	Correct	5 ms	1528 KB	Output is correct
34	Correct	6 ms	1528 KB	Output is correct
35	Correct	5 ms	1528 KB	Output is correct
36	Correct	6 ms	1528 KB	Output is correct
37	Correct	5 ms	1528 KB	Output is correct
38	Correct	5 ms	1528 KB	Output is correct
39	Correct	6 ms	1528 KB	Output is correct
40	Correct	6 ms	1528 KB	Output is correct
41	Correct	10 ms	1912 KB	Output is correct
42	Correct	9 ms	1912 KB	Output is correct
43	Correct	9 ms	1784 KB	Output is correct
44	Correct	9 ms	1784 KB	Output is correct
45	Correct	9 ms	1784 KB	Output is correct
46	Correct	9 ms	1784 KB	Output is correct
47	Correct	9 ms	1784 KB	Output is correct
48	Correct	9 ms	1784 KB	Output is correct
49	Correct	8 ms	1784 KB	Output is correct
50	Correct	5 ms	1528 KB	Output is correct
51	Correct	106 ms	8680 KB	Output is correct
52	Correct	101 ms	8676 KB	Output is correct
53	Correct	101 ms	8680 KB	Output is correct
54	Correct	100 ms	8680 KB	Output is correct
55	Correct	103 ms	8680 KB	Output is correct
56	Correct	104 ms	8728 KB	Output is correct
57	Correct	105 ms	8680 KB	Output is correct
58	Correct	70 ms	8680 KB	Output is correct
59	Correct	74 ms	8680 KB	Output is correct
60	Correct	5 ms	1528 KB	Output is correct
61	Correct	139 ms	8712 KB	Output is correct
62	Correct	135 ms	8680 KB	Output is correct
63	Correct	140 ms	8680 KB	Output is correct
64	Correct	138 ms	8684 KB	Output is correct
65	Correct	134 ms	8680 KB	Output is correct
66	Correct	135 ms	8680 KB	Output is correct
67	Correct	140 ms	8680 KB	Output is correct
68	Correct	140 ms	8680 KB	Output is correct
69	Correct	105 ms	8552 KB	Output is correct
70	Correct	5 ms	1528 KB	Output is correct

답안 #209766

Compilation message

Subtask #1 2.0 / 2.0

Subtask #2 4.0 / 4.0

Subtask #3 9.0 / 9.0

Subtask #4 36.0 / 36.0

Subtask #5 28.0 / 28.0

Subtask #6 9.0 / 9.0

Subtask #7 12.0 / 12.0

Subtask #1
2.0 / 2.0

Subtask #2
4.0 / 4.0

Subtask #3
9.0 / 9.0

Subtask #4
36.0 / 36.0

Subtask #5
28.0 / 28.0

Subtask #6
9.0 / 9.0

Subtask #7
12.0 / 12.0