답안 #569892

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
569892	2022-05-28T04:34:05 Z	jrodsc	Mountains (NOI20_mountains)	C++17	100 / 100	933 ms	79996 KB

Mountains

#include <bits/stdc++.h>
#define INF 1000000000
#define ll long long
#define MAX_N 300005

using namespace std;

struct SegmentTree{
	ll s = 0;
	
	SegmentTree * left = NULL, * right = NULL;
	
	SegmentTree(int l,int r,vector<int> &a){
		if(l == r){
			s = (ll)a[l];
		}else{
			int mid = (l+r)/2;
			left = new SegmentTree(l,mid,a);
			right = new SegmentTree(mid+1,r,a);
			
			s = left->s + right->s;
		}
	}
	
	void upd(int l,int r,int p,int k){
		if(l == p && r == p){
			s += k;
			//cout << l << ' ' << r << ' ' << s << endl;
		}
		else{
			int mid = (l+r)/2;
			if(p <= mid)
				left->upd(l,mid,p,k);
			else
				right->upd(mid+1,r,p,k);
			
			s = left->s + right->s;
		}
	}
	
	ll rsq(int l,int r,int ss,int e){
		if(l >= ss && r <= e)
			return s;
		else if(l > e || r < ss)
			return 0;
		else{
			int mid = (l+r)/2;
			return left->rsq(l,mid,ss,e) + right->rsq(mid+1,r,ss,e);
		}
	}
};

int main(){	
    ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	
	int n;
	
	cin >> n;
	
	ll h[n];
	
	set<ll> s;
	map<ll,int> trlt;
	for(int i = 0; i < n; i++){
		cin >> h[i];
		s.insert(h[i]);
	}
	
	int c = 0;
	for(auto x : s){
		trlt[x] = c++;
	}
	
	for(int i = 0; i < n; i++){
		h[i] = trlt[h[i]];
	}
	
	vector<int> a(MAX_N+1,0);
	
	SegmentTree st_left(0,MAX_N,a);
	
	for(int i = 0; i < n; i++){
		a[h[i]]++;
	}
	
	SegmentTree st_right(0,MAX_N,a);
	
	st_left.upd(0,MAX_N,h[0],1);
	st_right.upd(0,MAX_N,h[0],-1);
	st_right.upd(0,MAX_N,h[1],-1);
	
	ll ans = 0;
	
	for(int i = 1; i < n-1; i++){
		if(h[i] > 0) ans += st_left.rsq(0,MAX_N,0,h[i]-1) * st_right.rsq(0,MAX_N,0,h[i]-1);
		st_left.upd(0,MAX_N,h[i],1);
		st_right.upd(0,MAX_N,h[i+1],-1);
	}
	
	cout << ans << endl;
	
	return 0;
}

Subtask #1
2.0 / 2.0

#	결과	실행 시간	메모리	Grader output
1	Correct	41 ms	39040 KB	Output is correct
2	Correct	364 ms	74344 KB	Output is correct
3	Correct	372 ms	79828 KB	Output is correct
4	Correct	370 ms	79836 KB	Output is correct
5	Correct	365 ms	79832 KB	Output is correct
6	Correct	372 ms	79948 KB	Output is correct
7	Correct	375 ms	79820 KB	Output is correct
8	Correct	370 ms	79996 KB	Output is correct
9	Correct	301 ms	63896 KB	Output is correct
10	Correct	302 ms	64032 KB	Output is correct

Subtask #2
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	127 ms	41408 KB	Output is correct
2	Correct	126 ms	41460 KB	Output is correct
3	Correct	126 ms	41412 KB	Output is correct
4	Correct	121 ms	41416 KB	Output is correct
5	Correct	129 ms	41400 KB	Output is correct
6	Correct	130 ms	41408 KB	Output is correct
7	Correct	128 ms	41320 KB	Output is correct
8	Correct	118 ms	41312 KB	Output is correct
9	Correct	124 ms	41496 KB	Output is correct
10	Correct	45 ms	38944 KB	Output is correct

Subtask #3
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	127 ms	41408 KB	Output is correct
2	Correct	126 ms	41460 KB	Output is correct
3	Correct	126 ms	41412 KB	Output is correct
4	Correct	121 ms	41416 KB	Output is correct
5	Correct	129 ms	41400 KB	Output is correct
6	Correct	130 ms	41408 KB	Output is correct
7	Correct	128 ms	41320 KB	Output is correct
8	Correct	118 ms	41312 KB	Output is correct
9	Correct	124 ms	41496 KB	Output is correct
10	Correct	45 ms	38944 KB	Output is correct
11	Correct	187 ms	41416 KB	Output is correct
12	Correct	171 ms	42272 KB	Output is correct
13	Correct	180 ms	42284 KB	Output is correct
14	Correct	174 ms	42188 KB	Output is correct
15	Correct	174 ms	42172 KB	Output is correct
16	Correct	188 ms	42280 KB	Output is correct
17	Correct	181 ms	42276 KB	Output is correct
18	Correct	153 ms	42184 KB	Output is correct
19	Correct	154 ms	42272 KB	Output is correct
20	Correct	43 ms	39028 KB	Output is correct

Subtask #4
36.0 / 36.0

#	결과	실행 시간	메모리	Grader output
1	Correct	49 ms	39076 KB	Output is correct
2	Correct	42 ms	39084 KB	Output is correct
3	Correct	48 ms	39032 KB	Output is correct
4	Correct	43 ms	39116 KB	Output is correct
5	Correct	42 ms	39096 KB	Output is correct
6	Correct	42 ms	39008 KB	Output is correct
7	Correct	42 ms	39028 KB	Output is correct
8	Correct	43 ms	38988 KB	Output is correct
9	Correct	42 ms	38968 KB	Output is correct
10	Correct	43 ms	38940 KB	Output is correct

Subtask #5
28.0 / 28.0

#	결과	실행 시간	메모리	Grader output
1	Correct	49 ms	39076 KB	Output is correct
2	Correct	42 ms	39084 KB	Output is correct
3	Correct	48 ms	39032 KB	Output is correct
4	Correct	43 ms	39116 KB	Output is correct
5	Correct	42 ms	39096 KB	Output is correct
6	Correct	42 ms	39008 KB	Output is correct
7	Correct	42 ms	39028 KB	Output is correct
8	Correct	43 ms	38988 KB	Output is correct
9	Correct	42 ms	38968 KB	Output is correct
10	Correct	43 ms	38940 KB	Output is correct
11	Correct	58 ms	40360 KB	Output is correct
12	Correct	70 ms	40324 KB	Output is correct
13	Correct	55 ms	40300 KB	Output is correct
14	Correct	55 ms	40324 KB	Output is correct
15	Correct	67 ms	40412 KB	Output is correct
16	Correct	53 ms	40324 KB	Output is correct
17	Correct	55 ms	40368 KB	Output is correct
18	Correct	55 ms	39720 KB	Output is correct
19	Correct	48 ms	39216 KB	Output is correct
20	Correct	42 ms	39012 KB	Output is correct

Subtask #6
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	127 ms	41408 KB	Output is correct
2	Correct	126 ms	41460 KB	Output is correct
3	Correct	126 ms	41412 KB	Output is correct
4	Correct	121 ms	41416 KB	Output is correct
5	Correct	129 ms	41400 KB	Output is correct
6	Correct	130 ms	41408 KB	Output is correct
7	Correct	128 ms	41320 KB	Output is correct
8	Correct	118 ms	41312 KB	Output is correct
9	Correct	124 ms	41496 KB	Output is correct
10	Correct	45 ms	38944 KB	Output is correct
11	Correct	187 ms	41416 KB	Output is correct
12	Correct	171 ms	42272 KB	Output is correct
13	Correct	180 ms	42284 KB	Output is correct
14	Correct	174 ms	42188 KB	Output is correct
15	Correct	174 ms	42172 KB	Output is correct
16	Correct	188 ms	42280 KB	Output is correct
17	Correct	181 ms	42276 KB	Output is correct
18	Correct	153 ms	42184 KB	Output is correct
19	Correct	154 ms	42272 KB	Output is correct
20	Correct	43 ms	39028 KB	Output is correct
21	Correct	484 ms	53552 KB	Output is correct
22	Correct	507 ms	53596 KB	Output is correct
23	Correct	494 ms	53452 KB	Output is correct
24	Correct	501 ms	53544 KB	Output is correct
25	Correct	481 ms	53436 KB	Output is correct
26	Correct	496 ms	53548 KB	Output is correct
27	Correct	482 ms	53468 KB	Output is correct
28	Correct	244 ms	53644 KB	Output is correct
29	Correct	253 ms	53532 KB	Output is correct
30	Correct	44 ms	39040 KB	Output is correct

Subtask #7
12.0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	41 ms	39040 KB	Output is correct
2	Correct	364 ms	74344 KB	Output is correct
3	Correct	372 ms	79828 KB	Output is correct
4	Correct	370 ms	79836 KB	Output is correct
5	Correct	365 ms	79832 KB	Output is correct
6	Correct	372 ms	79948 KB	Output is correct
7	Correct	375 ms	79820 KB	Output is correct
8	Correct	370 ms	79996 KB	Output is correct
9	Correct	301 ms	63896 KB	Output is correct
10	Correct	302 ms	64032 KB	Output is correct
11	Correct	127 ms	41408 KB	Output is correct
12	Correct	126 ms	41460 KB	Output is correct
13	Correct	126 ms	41412 KB	Output is correct
14	Correct	121 ms	41416 KB	Output is correct
15	Correct	129 ms	41400 KB	Output is correct
16	Correct	130 ms	41408 KB	Output is correct
17	Correct	128 ms	41320 KB	Output is correct
18	Correct	118 ms	41312 KB	Output is correct
19	Correct	124 ms	41496 KB	Output is correct
20	Correct	45 ms	38944 KB	Output is correct
21	Correct	187 ms	41416 KB	Output is correct
22	Correct	171 ms	42272 KB	Output is correct
23	Correct	180 ms	42284 KB	Output is correct
24	Correct	174 ms	42188 KB	Output is correct
25	Correct	174 ms	42172 KB	Output is correct
26	Correct	188 ms	42280 KB	Output is correct
27	Correct	181 ms	42276 KB	Output is correct
28	Correct	153 ms	42184 KB	Output is correct
29	Correct	154 ms	42272 KB	Output is correct
30	Correct	43 ms	39028 KB	Output is correct
31	Correct	49 ms	39076 KB	Output is correct
32	Correct	42 ms	39084 KB	Output is correct
33	Correct	48 ms	39032 KB	Output is correct
34	Correct	43 ms	39116 KB	Output is correct
35	Correct	42 ms	39096 KB	Output is correct
36	Correct	42 ms	39008 KB	Output is correct
37	Correct	42 ms	39028 KB	Output is correct
38	Correct	43 ms	38988 KB	Output is correct
39	Correct	42 ms	38968 KB	Output is correct
40	Correct	43 ms	38940 KB	Output is correct
41	Correct	58 ms	40360 KB	Output is correct
42	Correct	70 ms	40324 KB	Output is correct
43	Correct	55 ms	40300 KB	Output is correct
44	Correct	55 ms	40324 KB	Output is correct
45	Correct	67 ms	40412 KB	Output is correct
46	Correct	53 ms	40324 KB	Output is correct
47	Correct	55 ms	40368 KB	Output is correct
48	Correct	55 ms	39720 KB	Output is correct
49	Correct	48 ms	39216 KB	Output is correct
50	Correct	42 ms	39012 KB	Output is correct
51	Correct	484 ms	53552 KB	Output is correct
52	Correct	507 ms	53596 KB	Output is correct
53	Correct	494 ms	53452 KB	Output is correct
54	Correct	501 ms	53544 KB	Output is correct
55	Correct	481 ms	53436 KB	Output is correct
56	Correct	496 ms	53548 KB	Output is correct
57	Correct	482 ms	53468 KB	Output is correct
58	Correct	244 ms	53644 KB	Output is correct
59	Correct	253 ms	53532 KB	Output is correct
60	Correct	44 ms	39040 KB	Output is correct
61	Correct	861 ms	79780 KB	Output is correct
62	Correct	881 ms	79860 KB	Output is correct
63	Correct	855 ms	79848 KB	Output is correct
64	Correct	873 ms	79832 KB	Output is correct
65	Correct	915 ms	79832 KB	Output is correct
66	Correct	885 ms	79904 KB	Output is correct
67	Correct	933 ms	79832 KB	Output is correct
68	Correct	725 ms	63988 KB	Output is correct
69	Correct	590 ms	57580 KB	Output is correct
70	Correct	40 ms	38984 KB	Output is correct

답안 #569892

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