oj.uz

Submission #493794

# Submission time Handle Problem Language Result Execution time Memory
493794 2021-12-13T02:47:32 Z nathanlee726 Group Photo (JOI21_ho_t3) C++14
100 / 100
 420 ms 392496 KB 
#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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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

# Verdict Execution time Memory 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