답안 #209415

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
209415	2020-03-14T07:19:05 Z	model_code	Mountains (NOI20_mountains)	C++17	100 / 100	599 ms	40312 KB

Mountains

#include<bits/stdc++.h>
using namespace std;
struct node{
	int s, e, m, cnt;
	node *l, *r;
	node(int _s, int _e): s(_s), e(_e), m((_s+_e)/2), cnt(0){
		if(s == e) return;
		l = new node(s, m);
		r = new node(m+1, e);
	}
	void update(int x, int v){
		cnt += v;
		if(s == e) return;
		if(x <= m) l->update(x, v);
		else r->update(x, v);
	}
	int query(int x, int y){
		if(x <= s && y >= e) return cnt;
		int ret = 0;
		if(x <= m) ret += l->query(x, y);
		if(y >= m+1) ret += r->query(x, y);
		return ret;
	}
	void clear(){
		cnt = 0;
		if(s == e) return;
		l->clear();
		r->clear();
	}
};

long long invLeft[300001], invRight[300001];
pair<long long, int> disArr[300001];
int cnt = 1;
long long solve(int n, long long H[]){
	for(int i = 1; i <= n; i++) disArr[i] = {H[i], i};
	sort(disArr + 1, disArr + n + 1);

	for(int i = 1; i <= n; i++){
		if (i > 1 && disArr[i].first != disArr[i-1].first) cnt++;
		H[disArr[i].second] = cnt;
	}
	
	node *root = new node(0, n);
	for(int i = 1; i <= n; i++){
		invLeft[i] = root->query(0, H[i] - 1);
		root->update(H[i], 1);
	}
	
	root->clear();
	for(int i = n; i > 0; i--){
		invRight[i] = root->query(0, H[i] - 1);
		root->update(H[i], 1);
	}
	
	long long total = 0;
	for(int i = 1; i <= n; i++){
		total += invLeft[i] * invRight[i];
	}
	
	return total;
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	int n;
	long long H[300001];
	cin >> n;
	for(int i = 1; i <= n; i++) cin >> H[i];
	long long total = solve(n, H);
	cout << total;
	return 0;
}

Subtask #1
2.0 / 2.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	376 KB	Output is correct
2	Correct	211 ms	40184 KB	Output is correct
3	Correct	217 ms	40184 KB	Output is correct
4	Correct	214 ms	40288 KB	Output is correct
5	Correct	225 ms	40184 KB	Output is correct
6	Correct	218 ms	40192 KB	Output is correct
7	Correct	215 ms	40312 KB	Output is correct
8	Correct	229 ms	40184 KB	Output is correct
9	Correct	230 ms	40184 KB	Output is correct
10	Correct	212 ms	40312 KB	Output is correct

Subtask #2
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	175 ms	40232 KB	Output is correct
2	Correct	179 ms	40188 KB	Output is correct
3	Correct	172 ms	40184 KB	Output is correct
4	Correct	164 ms	40184 KB	Output is correct
5	Correct	173 ms	40204 KB	Output is correct
6	Correct	188 ms	40312 KB	Output is correct
7	Correct	172 ms	40184 KB	Output is correct
8	Correct	151 ms	40304 KB	Output is correct
9	Correct	147 ms	40184 KB	Output is correct
10	Correct	5 ms	380 KB	Output is correct

Subtask #3
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	175 ms	40232 KB	Output is correct
2	Correct	179 ms	40188 KB	Output is correct
3	Correct	172 ms	40184 KB	Output is correct
4	Correct	164 ms	40184 KB	Output is correct
5	Correct	173 ms	40204 KB	Output is correct
6	Correct	188 ms	40312 KB	Output is correct
7	Correct	172 ms	40184 KB	Output is correct
8	Correct	151 ms	40304 KB	Output is correct
9	Correct	147 ms	40184 KB	Output is correct
10	Correct	5 ms	380 KB	Output is correct
11	Correct	207 ms	40288 KB	Output is correct
12	Correct	213 ms	40292 KB	Output is correct
13	Correct	200 ms	40184 KB	Output is correct
14	Correct	200 ms	40208 KB	Output is correct
15	Correct	205 ms	40240 KB	Output is correct
16	Correct	205 ms	40304 KB	Output is correct
17	Correct	198 ms	40188 KB	Output is correct
18	Correct	143 ms	40184 KB	Output is correct
19	Correct	155 ms	40288 KB	Output is correct
20	Correct	5 ms	376 KB	Output is correct

Subtask #4
36.0 / 36.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	376 KB	Output is correct
2	Correct	6 ms	504 KB	Output is correct
3	Correct	5 ms	384 KB	Output is correct
4	Correct	7 ms	376 KB	Output is correct
5	Correct	5 ms	376 KB	Output is correct
6	Correct	5 ms	376 KB	Output is correct
7	Correct	5 ms	504 KB	Output is correct
8	Correct	5 ms	376 KB	Output is correct
9	Correct	5 ms	376 KB	Output is correct
10	Correct	5 ms	376 KB	Output is correct

Subtask #5
28.0 / 28.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	376 KB	Output is correct
2	Correct	6 ms	504 KB	Output is correct
3	Correct	5 ms	384 KB	Output is correct
4	Correct	7 ms	376 KB	Output is correct
5	Correct	5 ms	376 KB	Output is correct
6	Correct	5 ms	376 KB	Output is correct
7	Correct	5 ms	504 KB	Output is correct
8	Correct	5 ms	376 KB	Output is correct
9	Correct	5 ms	376 KB	Output is correct
10	Correct	5 ms	376 KB	Output is correct
11	Correct	13 ms	1656 KB	Output is correct
12	Correct	14 ms	1624 KB	Output is correct
13	Correct	13 ms	1656 KB	Output is correct
14	Correct	13 ms	1656 KB	Output is correct
15	Correct	16 ms	1656 KB	Output is correct
16	Correct	13 ms	1656 KB	Output is correct
17	Correct	13 ms	1656 KB	Output is correct
18	Correct	13 ms	1656 KB	Output is correct
19	Correct	11 ms	1656 KB	Output is correct
20	Correct	5 ms	376 KB	Output is correct

Subtask #6
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	175 ms	40232 KB	Output is correct
2	Correct	179 ms	40188 KB	Output is correct
3	Correct	172 ms	40184 KB	Output is correct
4	Correct	164 ms	40184 KB	Output is correct
5	Correct	173 ms	40204 KB	Output is correct
6	Correct	188 ms	40312 KB	Output is correct
7	Correct	172 ms	40184 KB	Output is correct
8	Correct	151 ms	40304 KB	Output is correct
9	Correct	147 ms	40184 KB	Output is correct
10	Correct	5 ms	380 KB	Output is correct
11	Correct	207 ms	40288 KB	Output is correct
12	Correct	213 ms	40292 KB	Output is correct
13	Correct	200 ms	40184 KB	Output is correct
14	Correct	200 ms	40208 KB	Output is correct
15	Correct	205 ms	40240 KB	Output is correct
16	Correct	205 ms	40304 KB	Output is correct
17	Correct	198 ms	40188 KB	Output is correct
18	Correct	143 ms	40184 KB	Output is correct
19	Correct	155 ms	40288 KB	Output is correct
20	Correct	5 ms	376 KB	Output is correct
21	Correct	396 ms	40184 KB	Output is correct
22	Correct	414 ms	40184 KB	Output is correct
23	Correct	398 ms	40312 KB	Output is correct
24	Correct	388 ms	40184 KB	Output is correct
25	Correct	390 ms	40312 KB	Output is correct
26	Correct	396 ms	40184 KB	Output is correct
27	Correct	421 ms	40288 KB	Output is correct
28	Correct	181 ms	40184 KB	Output is correct
29	Correct	201 ms	40184 KB	Output is correct
30	Correct	5 ms	404 KB	Output is correct

Subtask #7
12.0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	376 KB	Output is correct
2	Correct	211 ms	40184 KB	Output is correct
3	Correct	217 ms	40184 KB	Output is correct
4	Correct	214 ms	40288 KB	Output is correct
5	Correct	225 ms	40184 KB	Output is correct
6	Correct	218 ms	40192 KB	Output is correct
7	Correct	215 ms	40312 KB	Output is correct
8	Correct	229 ms	40184 KB	Output is correct
9	Correct	230 ms	40184 KB	Output is correct
10	Correct	212 ms	40312 KB	Output is correct
11	Correct	175 ms	40232 KB	Output is correct
12	Correct	179 ms	40188 KB	Output is correct
13	Correct	172 ms	40184 KB	Output is correct
14	Correct	164 ms	40184 KB	Output is correct
15	Correct	173 ms	40204 KB	Output is correct
16	Correct	188 ms	40312 KB	Output is correct
17	Correct	172 ms	40184 KB	Output is correct
18	Correct	151 ms	40304 KB	Output is correct
19	Correct	147 ms	40184 KB	Output is correct
20	Correct	5 ms	380 KB	Output is correct
21	Correct	207 ms	40288 KB	Output is correct
22	Correct	213 ms	40292 KB	Output is correct
23	Correct	200 ms	40184 KB	Output is correct
24	Correct	200 ms	40208 KB	Output is correct
25	Correct	205 ms	40240 KB	Output is correct
26	Correct	205 ms	40304 KB	Output is correct
27	Correct	198 ms	40188 KB	Output is correct
28	Correct	143 ms	40184 KB	Output is correct
29	Correct	155 ms	40288 KB	Output is correct
30	Correct	5 ms	376 KB	Output is correct
31	Correct	5 ms	376 KB	Output is correct
32	Correct	6 ms	504 KB	Output is correct
33	Correct	5 ms	384 KB	Output is correct
34	Correct	7 ms	376 KB	Output is correct
35	Correct	5 ms	376 KB	Output is correct
36	Correct	5 ms	376 KB	Output is correct
37	Correct	5 ms	504 KB	Output is correct
38	Correct	5 ms	376 KB	Output is correct
39	Correct	5 ms	376 KB	Output is correct
40	Correct	5 ms	376 KB	Output is correct
41	Correct	13 ms	1656 KB	Output is correct
42	Correct	14 ms	1624 KB	Output is correct
43	Correct	13 ms	1656 KB	Output is correct
44	Correct	13 ms	1656 KB	Output is correct
45	Correct	16 ms	1656 KB	Output is correct
46	Correct	13 ms	1656 KB	Output is correct
47	Correct	13 ms	1656 KB	Output is correct
48	Correct	13 ms	1656 KB	Output is correct
49	Correct	11 ms	1656 KB	Output is correct
50	Correct	5 ms	376 KB	Output is correct
51	Correct	396 ms	40184 KB	Output is correct
52	Correct	414 ms	40184 KB	Output is correct
53	Correct	398 ms	40312 KB	Output is correct
54	Correct	388 ms	40184 KB	Output is correct
55	Correct	390 ms	40312 KB	Output is correct
56	Correct	396 ms	40184 KB	Output is correct
57	Correct	421 ms	40288 KB	Output is correct
58	Correct	181 ms	40184 KB	Output is correct
59	Correct	201 ms	40184 KB	Output is correct
60	Correct	5 ms	404 KB	Output is correct
61	Correct	588 ms	40284 KB	Output is correct
62	Correct	599 ms	40184 KB	Output is correct
63	Correct	565 ms	40184 KB	Output is correct
64	Correct	586 ms	40208 KB	Output is correct
65	Correct	555 ms	40184 KB	Output is correct
66	Correct	560 ms	40288 KB	Output is correct
67	Correct	564 ms	40296 KB	Output is correct
68	Correct	488 ms	40288 KB	Output is correct
69	Correct	445 ms	40244 KB	Output is correct
70	Correct	5 ms	376 KB	Output is correct

답안 #209415

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