답안 #493794

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
493794	2021-12-13T02:47:32 Z	nathanlee726	Group Photo (JOI21_ho_t3)	C++14	100 / 100	420 ms	392496 KB

Main

#include<bits/stdc++.h>
using namespace std; 
#define ll long long
#define int ll
#define pii pair<int,int>
#define X first
#define Y second
#define F(n) Fi(i,n) 
#define Fi(i,n) Fl(i,0,n)
#define Fl(i,l,n) for(int i=l;i<n;i++)
#define all(x) x.begin(),x.end()
#define sz(x) ((int)x.size())
#define abs(x) ((x)>0?(x):-(x))
#define pb push_back

int n,tab[5005][5005],stab[5005][5005],a[5005],b[5005],dp[5005];

int qry(int l1,int r1,int l2,int r2){
	//cout<<l1<<" "<<r1<<" "<<l2<<" "<<r2<<endl;
	//cout<<stab[r1][r2]<<" "<<stab[r1][l2-1]<<" "<<stab[l1-1][r2]<<" "<<stab[l1-1][l2-1]<<endl;
	return stab[r1][r2]-stab[r1][l2-1]-stab[l1-1][r2]+stab[l1-1][l2-1];
}

signed main(){
	ios_base::sync_with_stdio(0);cin.tie(0);
	cin>>n;
	F(n)cin>>a[i],b[a[i]]=i;
	int s=0;
	memset(tab,0,sizeof(tab));
	F(n)for(int j=i+1;j<n;j++){
		if(b[i+1]<b[j+1])s++,tab[i+1][j+1]=0;
		else tab[i+1][j+1]=1;
	}
	for(int i=0;i<=n;i++)stab[i][0]=stab[0][i]=0;
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n;j++)stab[i][j]=tab[i][j]+stab[i-1][j]+stab[i][j-1]-stab[i-1][j-1];
	}
	/*F(n+1){
		Fi(j,n+1)cout<<stab[i][j]<<" ";
		cout<<endl;
	}*/
	dp[n]=s;
	for(int i=n-1;i>=1;i--){
		dp[i]=1e9;
		for(int j=i+1;j<=n;j++){
			int tt=qry(1,i,i+1,j);
			dp[i]=min(dp[i],dp[j]-(i*(j-i))+tt*2);
		}
	}
	/*int no=n;
	for(int i=n-1;i>=1;i--){
		int tt=qry(1,i,i+1,no);
		cout<<tt<<" "<<(i*(no-i))-tt<<endl;
		if(tt<(i*(no-i))-tt){
			s-=((i*(no-i))-tt*2);
			no=i;
		}
		cout<<s<<endl;
	}*/
	s=1e9;
	F(n)s=min(dp[i+1],s);
	cout<<s<<endl;
	return 0;
}
/*

5 4
5 3
5 1
4 3
4 1
3 1
2 1
8 7
*/

Subtask #1
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	86 ms	196416 KB	Output is correct
2	Correct	86 ms	196416 KB	Output is correct
3	Correct	83 ms	196364 KB	Output is correct
4	Correct	80 ms	196320 KB	Output is correct
5	Correct	83 ms	196384 KB	Output is correct
6	Correct	106 ms	196320 KB	Output is correct
7	Correct	96 ms	196432 KB	Output is correct
8	Correct	81 ms	196400 KB	Output is correct
9	Correct	77 ms	196352 KB	Output is correct
10	Correct	79 ms	196336 KB	Output is correct

Subtask #2
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	86 ms	196416 KB	Output is correct
2	Correct	86 ms	196416 KB	Output is correct
3	Correct	83 ms	196364 KB	Output is correct
4	Correct	80 ms	196320 KB	Output is correct
5	Correct	83 ms	196384 KB	Output is correct
6	Correct	106 ms	196320 KB	Output is correct
7	Correct	96 ms	196432 KB	Output is correct
8	Correct	81 ms	196400 KB	Output is correct
9	Correct	77 ms	196352 KB	Output is correct
10	Correct	79 ms	196336 KB	Output is correct
11	Correct	84 ms	196356 KB	Output is correct
12	Correct	90 ms	196460 KB	Output is correct
13	Correct	96 ms	196476 KB	Output is correct
14	Correct	78 ms	196380 KB	Output is correct
15	Correct	85 ms	196384 KB	Output is correct
16	Correct	76 ms	196532 KB	Output is correct
17	Correct	88 ms	196488 KB	Output is correct
18	Correct	91 ms	196476 KB	Output is correct
19	Correct	97 ms	196432 KB	Output is correct
20	Correct	78 ms	196424 KB	Output is correct

Subtask #3
32.0 / 32.0

#	결과	실행 시간	메모리	Grader output
1	Correct	86 ms	196416 KB	Output is correct
2	Correct	86 ms	196416 KB	Output is correct
3	Correct	83 ms	196364 KB	Output is correct
4	Correct	80 ms	196320 KB	Output is correct
5	Correct	83 ms	196384 KB	Output is correct
6	Correct	106 ms	196320 KB	Output is correct
7	Correct	96 ms	196432 KB	Output is correct
8	Correct	81 ms	196400 KB	Output is correct
9	Correct	77 ms	196352 KB	Output is correct
10	Correct	79 ms	196336 KB	Output is correct
11	Correct	84 ms	196356 KB	Output is correct
12	Correct	90 ms	196460 KB	Output is correct
13	Correct	96 ms	196476 KB	Output is correct
14	Correct	78 ms	196380 KB	Output is correct
15	Correct	85 ms	196384 KB	Output is correct
16	Correct	76 ms	196532 KB	Output is correct
17	Correct	88 ms	196488 KB	Output is correct
18	Correct	91 ms	196476 KB	Output is correct
19	Correct	97 ms	196432 KB	Output is correct
20	Correct	78 ms	196424 KB	Output is correct
21	Correct	79 ms	197444 KB	Output is correct
22	Correct	82 ms	197476 KB	Output is correct
23	Correct	78 ms	197448 KB	Output is correct
24	Correct	87 ms	197432 KB	Output is correct
25	Correct	89 ms	197448 KB	Output is correct
26	Correct	97 ms	197440 KB	Output is correct
27	Correct	81 ms	197520 KB	Output is correct
28	Correct	81 ms	197420 KB	Output is correct
29	Correct	92 ms	197548 KB	Output is correct
30	Correct	100 ms	197456 KB	Output is correct

Subtask #4
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	86 ms	196416 KB	Output is correct
2	Correct	86 ms	196416 KB	Output is correct
3	Correct	83 ms	196364 KB	Output is correct
4	Correct	80 ms	196320 KB	Output is correct
5	Correct	83 ms	196384 KB	Output is correct
6	Correct	106 ms	196320 KB	Output is correct
7	Correct	96 ms	196432 KB	Output is correct
8	Correct	81 ms	196400 KB	Output is correct
9	Correct	77 ms	196352 KB	Output is correct
10	Correct	79 ms	196336 KB	Output is correct
11	Correct	84 ms	196356 KB	Output is correct
12	Correct	90 ms	196460 KB	Output is correct
13	Correct	96 ms	196476 KB	Output is correct
14	Correct	78 ms	196380 KB	Output is correct
15	Correct	85 ms	196384 KB	Output is correct
16	Correct	76 ms	196532 KB	Output is correct
17	Correct	88 ms	196488 KB	Output is correct
18	Correct	91 ms	196476 KB	Output is correct
19	Correct	97 ms	196432 KB	Output is correct
20	Correct	78 ms	196424 KB	Output is correct
21	Correct	79 ms	197444 KB	Output is correct
22	Correct	82 ms	197476 KB	Output is correct
23	Correct	78 ms	197448 KB	Output is correct
24	Correct	87 ms	197432 KB	Output is correct
25	Correct	89 ms	197448 KB	Output is correct
26	Correct	97 ms	197440 KB	Output is correct
27	Correct	81 ms	197520 KB	Output is correct
28	Correct	81 ms	197420 KB	Output is correct
29	Correct	92 ms	197548 KB	Output is correct
30	Correct	100 ms	197456 KB	Output is correct
31	Correct	89 ms	204540 KB	Output is correct
32	Correct	86 ms	204668 KB	Output is correct
33	Correct	83 ms	204552 KB	Output is correct
34	Correct	86 ms	204616 KB	Output is correct
35	Correct	90 ms	204640 KB	Output is correct
36	Correct	98 ms	204780 KB	Output is correct
37	Correct	97 ms	204608 KB	Output is correct
38	Correct	87 ms	204644 KB	Output is correct
39	Correct	89 ms	204612 KB	Output is correct
40	Correct	107 ms	204688 KB	Output is correct

Subtask #5
36.0 / 36.0

#	결과	실행 시간	메모리	Grader output
1	Correct	86 ms	196416 KB	Output is correct
2	Correct	86 ms	196416 KB	Output is correct
3	Correct	83 ms	196364 KB	Output is correct
4	Correct	80 ms	196320 KB	Output is correct
5	Correct	83 ms	196384 KB	Output is correct
6	Correct	106 ms	196320 KB	Output is correct
7	Correct	96 ms	196432 KB	Output is correct
8	Correct	81 ms	196400 KB	Output is correct
9	Correct	77 ms	196352 KB	Output is correct
10	Correct	79 ms	196336 KB	Output is correct
11	Correct	84 ms	196356 KB	Output is correct
12	Correct	90 ms	196460 KB	Output is correct
13	Correct	96 ms	196476 KB	Output is correct
14	Correct	78 ms	196380 KB	Output is correct
15	Correct	85 ms	196384 KB	Output is correct
16	Correct	76 ms	196532 KB	Output is correct
17	Correct	88 ms	196488 KB	Output is correct
18	Correct	91 ms	196476 KB	Output is correct
19	Correct	97 ms	196432 KB	Output is correct
20	Correct	78 ms	196424 KB	Output is correct
21	Correct	79 ms	197444 KB	Output is correct
22	Correct	82 ms	197476 KB	Output is correct
23	Correct	78 ms	197448 KB	Output is correct
24	Correct	87 ms	197432 KB	Output is correct
25	Correct	89 ms	197448 KB	Output is correct
26	Correct	97 ms	197440 KB	Output is correct
27	Correct	81 ms	197520 KB	Output is correct
28	Correct	81 ms	197420 KB	Output is correct
29	Correct	92 ms	197548 KB	Output is correct
30	Correct	100 ms	197456 KB	Output is correct
31	Correct	89 ms	204540 KB	Output is correct
32	Correct	86 ms	204668 KB	Output is correct
33	Correct	83 ms	204552 KB	Output is correct
34	Correct	86 ms	204616 KB	Output is correct
35	Correct	90 ms	204640 KB	Output is correct
36	Correct	98 ms	204780 KB	Output is correct
37	Correct	97 ms	204608 KB	Output is correct
38	Correct	87 ms	204644 KB	Output is correct
39	Correct	89 ms	204612 KB	Output is correct
40	Correct	107 ms	204688 KB	Output is correct
41	Correct	298 ms	392328 KB	Output is correct
42	Correct	314 ms	392428 KB	Output is correct
43	Correct	278 ms	392392 KB	Output is correct
44	Correct	306 ms	392300 KB	Output is correct
45	Correct	293 ms	392336 KB	Output is correct
46	Correct	420 ms	392392 KB	Output is correct
47	Correct	294 ms	392460 KB	Output is correct
48	Correct	277 ms	392336 KB	Output is correct
49	Correct	299 ms	392356 KB	Output is correct
50	Correct	275 ms	392464 KB	Output is correct
51	Correct	338 ms	392380 KB	Output is correct
52	Correct	285 ms	392352 KB	Output is correct
53	Correct	277 ms	392444 KB	Output is correct
54	Correct	323 ms	392496 KB	Output is correct
55	Correct	337 ms	392436 KB	Output is correct

답안 #493794

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