답안 #415481

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
415481	2021-06-01T07:00:05 Z	amoo_safar	Group Photo (JOI21_ho_t3)	C++17	100 / 100	268 ms	67512 KB

Main

// vaziat meshki-ghermeze !
#include <bits/stdc++.h>

#define pb push_back
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define debug(x) cerr << #x << " : " << x << '\n'

using namespace std;

typedef long long ll;
typedef long double ld;
typedef string str;
typedef pair<ll, ll> pll;

const ll Mod = 1000000007LL;
const int N = 5e3 + 10;
const ll Inf = 2242545357980376863LL;
const ll Log = 30;

int p[N], rv[N];
int sm[N][N];
int dp[N];

int C2(int x){ return x * (x - 1) / 2; }

int main(){
	ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	int n;
	cin >> n;
	for(int i = 1; i <= n; i++){
		cin >> p[i];
		rv[p[i]] = i;
	}
	for(int i = 1; i <= n; i++){
		for(int j = i + 1; j <= n; j++){
			if(rv[i] > rv[j])
				sm[i][j] ++;
		}
	}
	for(int i = 1; i <= n; i++)
		for(int j = i - 1; j >= 1; j--)
			sm[j][i] += sm[j + 1][i] + sm[j][i - 1] - sm[j + 1][i - 1];
	
	memset(dp, 31, sizeof dp);
	dp[0] = 0;
	for(int i = 0; i < n; i++){
		for(int j = i + 1; j <= n; j++)
			dp[j] = min(dp[j], dp[i] - sm[i + 1][j] + C2(j - i) - sm[i + 1][j]);
	}
	cout << dp[n] + sm[1][n] << '\n';
	return 0;
}

Subtask #1
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	332 KB	Output is correct
2	Correct	1 ms	332 KB	Output is correct
3	Correct	1 ms	332 KB	Output is correct
4	Correct	1 ms	332 KB	Output is correct
5	Correct	1 ms	332 KB	Output is correct
6	Correct	1 ms	332 KB	Output is correct
7	Correct	1 ms	324 KB	Output is correct
8	Correct	2 ms	320 KB	Output is correct
9	Correct	1 ms	320 KB	Output is correct
10	Correct	2 ms	332 KB	Output is correct

Subtask #2
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	332 KB	Output is correct
2	Correct	1 ms	332 KB	Output is correct
3	Correct	1 ms	332 KB	Output is correct
4	Correct	1 ms	332 KB	Output is correct
5	Correct	1 ms	332 KB	Output is correct
6	Correct	1 ms	332 KB	Output is correct
7	Correct	1 ms	324 KB	Output is correct
8	Correct	2 ms	320 KB	Output is correct
9	Correct	1 ms	320 KB	Output is correct
10	Correct	2 ms	332 KB	Output is correct
11	Correct	1 ms	332 KB	Output is correct
12	Correct	1 ms	332 KB	Output is correct
13	Correct	1 ms	332 KB	Output is correct
14	Correct	1 ms	332 KB	Output is correct
15	Correct	1 ms	332 KB	Output is correct
16	Correct	2 ms	332 KB	Output is correct
17	Correct	2 ms	328 KB	Output is correct
18	Correct	1 ms	332 KB	Output is correct
19	Correct	1 ms	332 KB	Output is correct
20	Correct	1 ms	332 KB	Output is correct

Subtask #3
32.0 / 32.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	332 KB	Output is correct
2	Correct	1 ms	332 KB	Output is correct
3	Correct	1 ms	332 KB	Output is correct
4	Correct	1 ms	332 KB	Output is correct
5	Correct	1 ms	332 KB	Output is correct
6	Correct	1 ms	332 KB	Output is correct
7	Correct	1 ms	324 KB	Output is correct
8	Correct	2 ms	320 KB	Output is correct
9	Correct	1 ms	320 KB	Output is correct
10	Correct	2 ms	332 KB	Output is correct
11	Correct	1 ms	332 KB	Output is correct
12	Correct	1 ms	332 KB	Output is correct
13	Correct	1 ms	332 KB	Output is correct
14	Correct	1 ms	332 KB	Output is correct
15	Correct	1 ms	332 KB	Output is correct
16	Correct	2 ms	332 KB	Output is correct
17	Correct	2 ms	328 KB	Output is correct
18	Correct	1 ms	332 KB	Output is correct
19	Correct	1 ms	332 KB	Output is correct
20	Correct	1 ms	332 KB	Output is correct
21	Correct	3 ms	1228 KB	Output is correct
22	Correct	3 ms	1228 KB	Output is correct
23	Correct	2 ms	1228 KB	Output is correct
24	Correct	2 ms	1228 KB	Output is correct
25	Correct	2 ms	1228 KB	Output is correct
26	Correct	2 ms	1228 KB	Output is correct
27	Correct	1 ms	1228 KB	Output is correct
28	Correct	2 ms	1228 KB	Output is correct
29	Correct	2 ms	1228 KB	Output is correct
30	Correct	2 ms	1216 KB	Output is correct

Subtask #4
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	332 KB	Output is correct
2	Correct	1 ms	332 KB	Output is correct
3	Correct	1 ms	332 KB	Output is correct
4	Correct	1 ms	332 KB	Output is correct
5	Correct	1 ms	332 KB	Output is correct
6	Correct	1 ms	332 KB	Output is correct
7	Correct	1 ms	324 KB	Output is correct
8	Correct	2 ms	320 KB	Output is correct
9	Correct	1 ms	320 KB	Output is correct
10	Correct	2 ms	332 KB	Output is correct
11	Correct	1 ms	332 KB	Output is correct
12	Correct	1 ms	332 KB	Output is correct
13	Correct	1 ms	332 KB	Output is correct
14	Correct	1 ms	332 KB	Output is correct
15	Correct	1 ms	332 KB	Output is correct
16	Correct	2 ms	332 KB	Output is correct
17	Correct	2 ms	328 KB	Output is correct
18	Correct	1 ms	332 KB	Output is correct
19	Correct	1 ms	332 KB	Output is correct
20	Correct	1 ms	332 KB	Output is correct
21	Correct	3 ms	1228 KB	Output is correct
22	Correct	3 ms	1228 KB	Output is correct
23	Correct	2 ms	1228 KB	Output is correct
24	Correct	2 ms	1228 KB	Output is correct
25	Correct	2 ms	1228 KB	Output is correct
26	Correct	2 ms	1228 KB	Output is correct
27	Correct	1 ms	1228 KB	Output is correct
28	Correct	2 ms	1228 KB	Output is correct
29	Correct	2 ms	1228 KB	Output is correct
30	Correct	2 ms	1216 KB	Output is correct
31	Correct	8 ms	4812 KB	Output is correct
32	Correct	7 ms	4812 KB	Output is correct
33	Correct	9 ms	4936 KB	Output is correct
34	Correct	6 ms	4812 KB	Output is correct
35	Correct	6 ms	4804 KB	Output is correct
36	Correct	6 ms	4812 KB	Output is correct
37	Correct	7 ms	4812 KB	Output is correct
38	Correct	6 ms	4812 KB	Output is correct
39	Correct	6 ms	4812 KB	Output is correct
40	Correct	7 ms	4812 KB	Output is correct

Subtask #5
36.0 / 36.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	332 KB	Output is correct
2	Correct	1 ms	332 KB	Output is correct
3	Correct	1 ms	332 KB	Output is correct
4	Correct	1 ms	332 KB	Output is correct
5	Correct	1 ms	332 KB	Output is correct
6	Correct	1 ms	332 KB	Output is correct
7	Correct	1 ms	324 KB	Output is correct
8	Correct	2 ms	320 KB	Output is correct
9	Correct	1 ms	320 KB	Output is correct
10	Correct	2 ms	332 KB	Output is correct
11	Correct	1 ms	332 KB	Output is correct
12	Correct	1 ms	332 KB	Output is correct
13	Correct	1 ms	332 KB	Output is correct
14	Correct	1 ms	332 KB	Output is correct
15	Correct	1 ms	332 KB	Output is correct
16	Correct	2 ms	332 KB	Output is correct
17	Correct	2 ms	328 KB	Output is correct
18	Correct	1 ms	332 KB	Output is correct
19	Correct	1 ms	332 KB	Output is correct
20	Correct	1 ms	332 KB	Output is correct
21	Correct	3 ms	1228 KB	Output is correct
22	Correct	3 ms	1228 KB	Output is correct
23	Correct	2 ms	1228 KB	Output is correct
24	Correct	2 ms	1228 KB	Output is correct
25	Correct	2 ms	1228 KB	Output is correct
26	Correct	2 ms	1228 KB	Output is correct
27	Correct	1 ms	1228 KB	Output is correct
28	Correct	2 ms	1228 KB	Output is correct
29	Correct	2 ms	1228 KB	Output is correct
30	Correct	2 ms	1216 KB	Output is correct
31	Correct	8 ms	4812 KB	Output is correct
32	Correct	7 ms	4812 KB	Output is correct
33	Correct	9 ms	4936 KB	Output is correct
34	Correct	6 ms	4812 KB	Output is correct
35	Correct	6 ms	4804 KB	Output is correct
36	Correct	6 ms	4812 KB	Output is correct
37	Correct	7 ms	4812 KB	Output is correct
38	Correct	6 ms	4812 KB	Output is correct
39	Correct	6 ms	4812 KB	Output is correct
40	Correct	7 ms	4812 KB	Output is correct
41	Correct	261 ms	67308 KB	Output is correct
42	Correct	237 ms	67332 KB	Output is correct
43	Correct	256 ms	67292 KB	Output is correct
44	Correct	262 ms	67344 KB	Output is correct
45	Correct	245 ms	67264 KB	Output is correct
46	Correct	258 ms	67352 KB	Output is correct
47	Correct	236 ms	67352 KB	Output is correct
48	Correct	257 ms	67400 KB	Output is correct
49	Correct	238 ms	67284 KB	Output is correct
50	Correct	246 ms	67460 KB	Output is correct
51	Correct	261 ms	67512 KB	Output is correct
52	Correct	233 ms	67260 KB	Output is correct
53	Correct	250 ms	67292 KB	Output is correct
54	Correct	268 ms	67304 KB	Output is correct
55	Correct	251 ms	67288 KB	Output is correct

답안 #415481

Compilation message

Subtask #1 5.0 / 5.0

Subtask #2 7.0 / 7.0

Subtask #3 32.0 / 32.0

Subtask #4 20.0 / 20.0

Subtask #5 36.0 / 36.0

Subtask #1
5.0 / 5.0

Subtask #2
7.0 / 7.0

Subtask #3
32.0 / 32.0

Subtask #4
20.0 / 20.0

Subtask #5
36.0 / 36.0