답안 #421128

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
421128	2021-06-08T18:30:11 Z	Kerim	Group Photo (JOI21_ho_t3)	C++17	100 / 100	2087 ms	789080 KB

Main

#include "bits/stdc++.h"
#define MAXN 100009
#define INF 1000000007
#define mp(x,y) make_pair(x,y)
#define all(v) v.begin(),v.end()
#define pb(x) push_back(x)
#define wr cout<<"----------------"<<endl;
#define ppb() pop_back()
#define tr(ii,c) for(__typeof((c).begin()) ii=(c).begin();ii!=(c).end();ii++)
#define ff first
#define ss second
#define my_little_dodge 46
#define debug(x)  cerr<< #x <<" = "<< x<<endl;
using namespace std;
 
typedef long long ll;
typedef pair<int,int> PII;
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
const int N=5005;
int n,arr[N],inv[N][N],dp[N][N];
int odp[N][N],par[N][N],F[N][N];
int A[N][N],B[N][N],sdp[N][N],rap[N][N];
//inv[x][x]=0
int g(int x,int y){
	if(x>=y)return 0;
	int &ret=odp[x][y];
	if(~ret)return ret;
	return ret=g(x,y-1)+par[y][y]-par[y][x-1];	
}
int cost(int a,int b){
	return g(a+1,b-1)+F[a][b-1]+(B[b][b-1]-B[b][a]);
}
int main(){
	//freopen("file.in", "r", stdin);
	memset(odp,-1,sizeof odp);
	scanf("%d",&n);
	for(int i=1;i<=n;i++)scanf("%d",arr+i);
	for(int i=2;i<=n;i++)
		for(int j=1;j<i;j++)
			inv[arr[i]][arr[j]]=1;
	for(int j=1;j<=n;j++)
		for(int i=1;i<=n;i++){
			par[j][i]=par[j][i-1]+inv[j][i];
			rap[j][i]=rap[j][i-1]+inv[i][j];
		}
	//f(1,a,a+1,b-1) = F[a][b-1]
	for(int a=1;a<=n;a++)
		for(int y=a+1;y<=n;y++)
			F[a][y]=F[a][y-1]+rap[y][a];
	for(int k=1;k<=n;k++)
		for(int i=1;i<=n;i++){
			A[k][i]=A[k][i-1]+inv[i][k];
			B[k][i]=B[k][i-1]+inv[k][i];
		}
	for(int a=n;a>=0;a--){
		for(int b=a+1;b<=n;b++){
			if(b==n) dp[a][b]=cost(a,b);
			else dp[a][b]=sdp[b][b+1]+cost(a,b);
		}
		sdp[a][n+1]=INF;
		for(int b=n;b>a;b--)
			sdp[a][b]=min(sdp[a][b+1],dp[a][b]+A[b][a]);
	}
	int ans=INF;
	for(int i=1;i<=n;i++)
		umin(ans,dp[0][i]);
	printf("%d\n",ans);
	return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:37:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |  scanf("%d",&n);
      |  ~~~~~^~~~~~~~~
Main.cpp:38:28: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |  for(int i=1;i<=n;i++)scanf("%d",arr+i);
      |                       ~~~~~^~~~~~~~~~~~

Subtask #1
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	46 ms	98468 KB	Output is correct
2	Correct	53 ms	98400 KB	Output is correct
3	Correct	48 ms	98440 KB	Output is correct
4	Correct	46 ms	98500 KB	Output is correct
5	Correct	46 ms	98532 KB	Output is correct
6	Correct	46 ms	98584 KB	Output is correct
7	Correct	54 ms	98604 KB	Output is correct
8	Correct	47 ms	98628 KB	Output is correct
9	Correct	47 ms	98756 KB	Output is correct
10	Correct	48 ms	98628 KB	Output is correct

Subtask #2
7.0 / 7.0

#	결과	실행 시간	메모리	Grader output
1	Correct	46 ms	98468 KB	Output is correct
2	Correct	53 ms	98400 KB	Output is correct
3	Correct	48 ms	98440 KB	Output is correct
4	Correct	46 ms	98500 KB	Output is correct
5	Correct	46 ms	98532 KB	Output is correct
6	Correct	46 ms	98584 KB	Output is correct
7	Correct	54 ms	98604 KB	Output is correct
8	Correct	47 ms	98628 KB	Output is correct
9	Correct	47 ms	98756 KB	Output is correct
10	Correct	48 ms	98628 KB	Output is correct
11	Correct	47 ms	98872 KB	Output is correct
12	Correct	48 ms	98884 KB	Output is correct
13	Correct	47 ms	98876 KB	Output is correct
14	Correct	47 ms	98884 KB	Output is correct
15	Correct	51 ms	98904 KB	Output is correct
16	Correct	49 ms	98992 KB	Output is correct
17	Correct	47 ms	98936 KB	Output is correct
18	Correct	50 ms	98892 KB	Output is correct
19	Correct	54 ms	98992 KB	Output is correct
20	Correct	48 ms	98920 KB	Output is correct

Subtask #3
32.0 / 32.0

#	결과	실행 시간	메모리	Grader output
1	Correct	46 ms	98468 KB	Output is correct
2	Correct	53 ms	98400 KB	Output is correct
3	Correct	48 ms	98440 KB	Output is correct
4	Correct	46 ms	98500 KB	Output is correct
5	Correct	46 ms	98532 KB	Output is correct
6	Correct	46 ms	98584 KB	Output is correct
7	Correct	54 ms	98604 KB	Output is correct
8	Correct	47 ms	98628 KB	Output is correct
9	Correct	47 ms	98756 KB	Output is correct
10	Correct	48 ms	98628 KB	Output is correct
11	Correct	47 ms	98872 KB	Output is correct
12	Correct	48 ms	98884 KB	Output is correct
13	Correct	47 ms	98876 KB	Output is correct
14	Correct	47 ms	98884 KB	Output is correct
15	Correct	51 ms	98904 KB	Output is correct
16	Correct	49 ms	98992 KB	Output is correct
17	Correct	47 ms	98936 KB	Output is correct
18	Correct	50 ms	98892 KB	Output is correct
19	Correct	54 ms	98992 KB	Output is correct
20	Correct	48 ms	98920 KB	Output is correct
21	Correct	51 ms	105640 KB	Output is correct
22	Correct	52 ms	105800 KB	Output is correct
23	Correct	52 ms	105804 KB	Output is correct
24	Correct	54 ms	105656 KB	Output is correct
25	Correct	52 ms	105824 KB	Output is correct
26	Correct	51 ms	105656 KB	Output is correct
27	Correct	51 ms	105716 KB	Output is correct
28	Correct	51 ms	105664 KB	Output is correct
29	Correct	52 ms	105812 KB	Output is correct
30	Correct	52 ms	105832 KB	Output is correct

Subtask #4
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	46 ms	98468 KB	Output is correct
2	Correct	53 ms	98400 KB	Output is correct
3	Correct	48 ms	98440 KB	Output is correct
4	Correct	46 ms	98500 KB	Output is correct
5	Correct	46 ms	98532 KB	Output is correct
6	Correct	46 ms	98584 KB	Output is correct
7	Correct	54 ms	98604 KB	Output is correct
8	Correct	47 ms	98628 KB	Output is correct
9	Correct	47 ms	98756 KB	Output is correct
10	Correct	48 ms	98628 KB	Output is correct
11	Correct	47 ms	98872 KB	Output is correct
12	Correct	48 ms	98884 KB	Output is correct
13	Correct	47 ms	98876 KB	Output is correct
14	Correct	47 ms	98884 KB	Output is correct
15	Correct	51 ms	98904 KB	Output is correct
16	Correct	49 ms	98992 KB	Output is correct
17	Correct	47 ms	98936 KB	Output is correct
18	Correct	50 ms	98892 KB	Output is correct
19	Correct	54 ms	98992 KB	Output is correct
20	Correct	48 ms	98920 KB	Output is correct
21	Correct	51 ms	105640 KB	Output is correct
22	Correct	52 ms	105800 KB	Output is correct
23	Correct	52 ms	105804 KB	Output is correct
24	Correct	54 ms	105656 KB	Output is correct
25	Correct	52 ms	105824 KB	Output is correct
26	Correct	51 ms	105656 KB	Output is correct
27	Correct	51 ms	105716 KB	Output is correct
28	Correct	51 ms	105664 KB	Output is correct
29	Correct	52 ms	105812 KB	Output is correct
30	Correct	52 ms	105832 KB	Output is correct
31	Correct	91 ms	140100 KB	Output is correct
32	Correct	88 ms	140244 KB	Output is correct
33	Correct	89 ms	140260 KB	Output is correct
34	Correct	92 ms	140404 KB	Output is correct
35	Correct	89 ms	140428 KB	Output is correct
36	Correct	86 ms	140356 KB	Output is correct
37	Correct	98 ms	140240 KB	Output is correct
38	Correct	88 ms	140348 KB	Output is correct
39	Correct	97 ms	140356 KB	Output is correct
40	Correct	90 ms	140296 KB	Output is correct

Subtask #5
36.0 / 36.0

#	결과	실행 시간	메모리	Grader output
1	Correct	46 ms	98468 KB	Output is correct
2	Correct	53 ms	98400 KB	Output is correct
3	Correct	48 ms	98440 KB	Output is correct
4	Correct	46 ms	98500 KB	Output is correct
5	Correct	46 ms	98532 KB	Output is correct
6	Correct	46 ms	98584 KB	Output is correct
7	Correct	54 ms	98604 KB	Output is correct
8	Correct	47 ms	98628 KB	Output is correct
9	Correct	47 ms	98756 KB	Output is correct
10	Correct	48 ms	98628 KB	Output is correct
11	Correct	47 ms	98872 KB	Output is correct
12	Correct	48 ms	98884 KB	Output is correct
13	Correct	47 ms	98876 KB	Output is correct
14	Correct	47 ms	98884 KB	Output is correct
15	Correct	51 ms	98904 KB	Output is correct
16	Correct	49 ms	98992 KB	Output is correct
17	Correct	47 ms	98936 KB	Output is correct
18	Correct	50 ms	98892 KB	Output is correct
19	Correct	54 ms	98992 KB	Output is correct
20	Correct	48 ms	98920 KB	Output is correct
21	Correct	51 ms	105640 KB	Output is correct
22	Correct	52 ms	105800 KB	Output is correct
23	Correct	52 ms	105804 KB	Output is correct
24	Correct	54 ms	105656 KB	Output is correct
25	Correct	52 ms	105824 KB	Output is correct
26	Correct	51 ms	105656 KB	Output is correct
27	Correct	51 ms	105716 KB	Output is correct
28	Correct	51 ms	105664 KB	Output is correct
29	Correct	52 ms	105812 KB	Output is correct
30	Correct	52 ms	105832 KB	Output is correct
31	Correct	91 ms	140100 KB	Output is correct
32	Correct	88 ms	140244 KB	Output is correct
33	Correct	89 ms	140260 KB	Output is correct
34	Correct	92 ms	140404 KB	Output is correct
35	Correct	89 ms	140428 KB	Output is correct
36	Correct	86 ms	140356 KB	Output is correct
37	Correct	98 ms	140240 KB	Output is correct
38	Correct	88 ms	140348 KB	Output is correct
39	Correct	97 ms	140356 KB	Output is correct
40	Correct	90 ms	140296 KB	Output is correct
41	Correct	2009 ms	788436 KB	Output is correct
42	Correct	2058 ms	788676 KB	Output is correct
43	Correct	2069 ms	788900 KB	Output is correct
44	Correct	2045 ms	788944 KB	Output is correct
45	Correct	2075 ms	788960 KB	Output is correct
46	Correct	2087 ms	789020 KB	Output is correct
47	Correct	2040 ms	788956 KB	Output is correct
48	Correct	2036 ms	789000 KB	Output is correct
49	Correct	2025 ms	788920 KB	Output is correct
50	Correct	2035 ms	788880 KB	Output is correct
51	Correct	2031 ms	789080 KB	Output is correct
52	Correct	2082 ms	788980 KB	Output is correct
53	Correct	2040 ms	788936 KB	Output is correct
54	Correct	2040 ms	788972 KB	Output is correct
55	Correct	2037 ms	788996 KB	Output is correct

답안 #421128

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