답안 #1087902

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1087902	2024-09-13T11:30:13 Z	vuavisao	Mountains (NOI20_mountains)	C++14	100 / 100	121 ms	7064 KB

Mountains

#include <bits/stdc++.h>
using namespace std;

const int N = (int) 3e5 + 10;

int n;
long long a[N];

int L[N], R[N];
int tree[N];

void Update(int idx, int val) {
	for( ; idx <= n; idx += (idx & - idx)) tree[idx] += val;
}

int Query(int idx) {
	int res = 0;
	for( ; idx > 0; idx -= (idx & - idx)) res += tree[idx];
	return res;
}

void compress() {
	vector<long long> Pos = {};
	for (int i = 1; i <= n; ++ i) {
		Pos.push_back(a[i]);
	}
	
	sort(Pos.begin(), Pos.end());
	Pos.resize(unique(Pos.begin(), Pos.end()) - Pos.begin());

	for (int i = 1; i <= n; ++ i) {
		a[i] = lower_bound(Pos.begin(), Pos.end(), a[i]) - Pos.begin() + 1;
	}
}

void calc(int cnt[]) {
	for (int i = 0; i <= n; ++ i) tree[i] = 0;
	for (int i = 1; i <= n; ++ i) {
		cnt[i] = Query(a[i]);
		Update(a[i] + 1, 1);
	}
}

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr); cout.tie(nullptr);
	cin >> n;
	for (int i = 1; i <= n; ++ i) cin >> a[i];
	compress();
	calc(L);
	reverse(a + 1, a + 1 + n);
	calc(R);
	long long res = 0;
	for (int i = 1; i <= n; ++ i) res += 1ll * L[i] * R[n - i + 1];
	cout << res;
	return 0;
}

Subtask #1
2.0 / 2.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	60 ms	6932 KB	Output is correct
3	Correct	59 ms	6864 KB	Output is correct
4	Correct	60 ms	6940 KB	Output is correct
5	Correct	62 ms	6864 KB	Output is correct
6	Correct	60 ms	6856 KB	Output is correct
7	Correct	59 ms	6868 KB	Output is correct
8	Correct	59 ms	6860 KB	Output is correct
9	Correct	59 ms	6856 KB	Output is correct
10	Correct	60 ms	6864 KB	Output is correct

Subtask #2
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	41 ms	6868 KB	Output is correct
2	Correct	52 ms	6992 KB	Output is correct
3	Correct	44 ms	7048 KB	Output is correct
4	Correct	42 ms	6864 KB	Output is correct
5	Correct	43 ms	6860 KB	Output is correct
6	Correct	46 ms	7012 KB	Output is correct
7	Correct	39 ms	6868 KB	Output is correct
8	Correct	37 ms	6856 KB	Output is correct
9	Correct	36 ms	6864 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct

Subtask #3
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	41 ms	6868 KB	Output is correct
2	Correct	52 ms	6992 KB	Output is correct
3	Correct	44 ms	7048 KB	Output is correct
4	Correct	42 ms	6864 KB	Output is correct
5	Correct	43 ms	6860 KB	Output is correct
6	Correct	46 ms	7012 KB	Output is correct
7	Correct	39 ms	6868 KB	Output is correct
8	Correct	37 ms	6856 KB	Output is correct
9	Correct	36 ms	6864 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct
11	Correct	55 ms	7064 KB	Output is correct
12	Correct	47 ms	6864 KB	Output is correct
13	Correct	51 ms	7028 KB	Output is correct
14	Correct	48 ms	6868 KB	Output is correct
15	Correct	49 ms	6864 KB	Output is correct
16	Correct	50 ms	6868 KB	Output is correct
17	Correct	49 ms	6864 KB	Output is correct
18	Correct	33 ms	6868 KB	Output is correct
19	Correct	33 ms	6864 KB	Output is correct
20	Correct	0 ms	348 KB	Output is correct

Subtask #4
36.0 / 36.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	344 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	344 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	0 ms	344 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	344 KB	Output is correct

Subtask #5
28.0 / 28.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	344 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	344 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	0 ms	344 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	344 KB	Output is correct
11	Correct	3 ms	780 KB	Output is correct
12	Correct	4 ms	780 KB	Output is correct
13	Correct	3 ms	780 KB	Output is correct
14	Correct	3 ms	780 KB	Output is correct
15	Correct	3 ms	780 KB	Output is correct
16	Correct	3 ms	652 KB	Output is correct
17	Correct	3 ms	776 KB	Output is correct
18	Correct	3 ms	780 KB	Output is correct
19	Correct	2 ms	780 KB	Output is correct
20	Correct	0 ms	348 KB	Output is correct

Subtask #6
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	41 ms	6868 KB	Output is correct
2	Correct	52 ms	6992 KB	Output is correct
3	Correct	44 ms	7048 KB	Output is correct
4	Correct	42 ms	6864 KB	Output is correct
5	Correct	43 ms	6860 KB	Output is correct
6	Correct	46 ms	7012 KB	Output is correct
7	Correct	39 ms	6868 KB	Output is correct
8	Correct	37 ms	6856 KB	Output is correct
9	Correct	36 ms	6864 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct
11	Correct	55 ms	7064 KB	Output is correct
12	Correct	47 ms	6864 KB	Output is correct
13	Correct	51 ms	7028 KB	Output is correct
14	Correct	48 ms	6868 KB	Output is correct
15	Correct	49 ms	6864 KB	Output is correct
16	Correct	50 ms	6868 KB	Output is correct
17	Correct	49 ms	6864 KB	Output is correct
18	Correct	33 ms	6868 KB	Output is correct
19	Correct	33 ms	6864 KB	Output is correct
20	Correct	0 ms	348 KB	Output is correct
21	Correct	92 ms	6868 KB	Output is correct
22	Correct	98 ms	6868 KB	Output is correct
23	Correct	93 ms	6864 KB	Output is correct
24	Correct	95 ms	6868 KB	Output is correct
25	Correct	97 ms	6864 KB	Output is correct
26	Correct	93 ms	6868 KB	Output is correct
27	Correct	92 ms	6864 KB	Output is correct
28	Correct	41 ms	6868 KB	Output is correct
29	Correct	43 ms	6904 KB	Output is correct
30	Correct	0 ms	348 KB	Output is correct

Subtask #7
12.0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	60 ms	6932 KB	Output is correct
3	Correct	59 ms	6864 KB	Output is correct
4	Correct	60 ms	6940 KB	Output is correct
5	Correct	62 ms	6864 KB	Output is correct
6	Correct	60 ms	6856 KB	Output is correct
7	Correct	59 ms	6868 KB	Output is correct
8	Correct	59 ms	6860 KB	Output is correct
9	Correct	59 ms	6856 KB	Output is correct
10	Correct	60 ms	6864 KB	Output is correct
11	Correct	41 ms	6868 KB	Output is correct
12	Correct	52 ms	6992 KB	Output is correct
13	Correct	44 ms	7048 KB	Output is correct
14	Correct	42 ms	6864 KB	Output is correct
15	Correct	43 ms	6860 KB	Output is correct
16	Correct	46 ms	7012 KB	Output is correct
17	Correct	39 ms	6868 KB	Output is correct
18	Correct	37 ms	6856 KB	Output is correct
19	Correct	36 ms	6864 KB	Output is correct
20	Correct	1 ms	348 KB	Output is correct
21	Correct	55 ms	7064 KB	Output is correct
22	Correct	47 ms	6864 KB	Output is correct
23	Correct	51 ms	7028 KB	Output is correct
24	Correct	48 ms	6868 KB	Output is correct
25	Correct	49 ms	6864 KB	Output is correct
26	Correct	50 ms	6868 KB	Output is correct
27	Correct	49 ms	6864 KB	Output is correct
28	Correct	33 ms	6868 KB	Output is correct
29	Correct	33 ms	6864 KB	Output is correct
30	Correct	0 ms	348 KB	Output is correct
31	Correct	0 ms	344 KB	Output is correct
32	Correct	0 ms	348 KB	Output is correct
33	Correct	0 ms	348 KB	Output is correct
34	Correct	0 ms	348 KB	Output is correct
35	Correct	0 ms	344 KB	Output is correct
36	Correct	1 ms	348 KB	Output is correct
37	Correct	0 ms	344 KB	Output is correct
38	Correct	0 ms	348 KB	Output is correct
39	Correct	0 ms	348 KB	Output is correct
40	Correct	0 ms	344 KB	Output is correct
41	Correct	3 ms	780 KB	Output is correct
42	Correct	4 ms	780 KB	Output is correct
43	Correct	3 ms	780 KB	Output is correct
44	Correct	3 ms	780 KB	Output is correct
45	Correct	3 ms	780 KB	Output is correct
46	Correct	3 ms	652 KB	Output is correct
47	Correct	3 ms	776 KB	Output is correct
48	Correct	3 ms	780 KB	Output is correct
49	Correct	2 ms	780 KB	Output is correct
50	Correct	0 ms	348 KB	Output is correct
51	Correct	92 ms	6868 KB	Output is correct
52	Correct	98 ms	6868 KB	Output is correct
53	Correct	93 ms	6864 KB	Output is correct
54	Correct	95 ms	6868 KB	Output is correct
55	Correct	97 ms	6864 KB	Output is correct
56	Correct	93 ms	6868 KB	Output is correct
57	Correct	92 ms	6864 KB	Output is correct
58	Correct	41 ms	6868 KB	Output is correct
59	Correct	43 ms	6904 KB	Output is correct
60	Correct	0 ms	348 KB	Output is correct
61	Correct	121 ms	6996 KB	Output is correct
62	Correct	114 ms	6884 KB	Output is correct
63	Correct	115 ms	6856 KB	Output is correct
64	Correct	118 ms	6868 KB	Output is correct
65	Correct	115 ms	6856 KB	Output is correct
66	Correct	115 ms	6856 KB	Output is correct
67	Correct	117 ms	6860 KB	Output is correct
68	Correct	113 ms	6856 KB	Output is correct
69	Correct	93 ms	6880 KB	Output is correct
70	Correct	0 ms	348 KB	Output is correct

답안 #1087902

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