Submission #1105054

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1105054	2024-10-25T08:57:36 Z	alexander707070	Ancient Books (IOI17_books)	C++14	50 / 100	105 ms	29436 KB

books

#include<bits/stdc++.h>
#define MAXN 1000007
using namespace std;
 
int n,s,p[MAXN],fr,last,mins,maxs,pref[MAXN],curr;
bool li[MAXN];
long long ans;
 
int k,cycle[MAXN];
pair<int,int> where[MAXN];
 
void dfs(int x){
	li[x]=true;
	cycle[x]=k;
 
	ans+=abs(x-p[x]);
	mins=min(mins,x);
	maxs=max(maxs,x);
 
	if(!li[p[x]])dfs(p[x]);
}
 
int dp[1007][1007];
bool vis[1007][1007];
 
int ff(int l,int r){
	if(l==1 and r==n)return 0;
	
	if(vis[l][r])return dp[l][r];
	vis[l][r]=true;
	dp[l][r]=2*n;
 
	if(l>1){
		int from=l-1,to=r,ll=l-1,rr=r+1;
		while(ll>=from or rr<=to){
			while(ll>=from){
				from=min(from,where[cycle[ll]].first);
				to=max(to,where[cycle[ll]].second);
				ll--;
			}
 
			while(rr<=to){
				from=min(from,where[cycle[rr]].first);
				to=max(to,where[cycle[rr]].second);
				rr++;
			}
		}
 
		dp[l][r]=min(dp[l][r],ff(from,to)+2);
	}
 
	if(r<n){
		int from=l,to=r+1,ll=l-1,rr=r+1;
		while(ll>=from or rr<=to){
			while(ll>=from){
				from=min(from,where[cycle[ll]].first);
				to=max(to,where[cycle[ll]].second);
				ll--;
			}
 
			while(rr<=to){
				from=min(from,where[cycle[rr]].first);
				to=max(to,where[cycle[rr]].second);
				rr++;
			}
		}
 
		dp[l][r]=min(dp[l][r],ff(from,to)+2);
	}
 
	return dp[l][r];
}
 
long long minimum_walk(vector<int> P, int S){
	n=int(P.size()); s=S+1;
 
	for(int i=1;i<=n;i++){
		p[i]=P[i-1]+1;
		li[i]=false; pref[i]=0;
	}
	last=0; fr=n+1; k=0; ans=0;
 
	for(int i=1;i<=n;i++){
		if(!li[i]){
			if(p[i]!=i)last=i;
			dfs(i);
		}
	}
 
	for(int i=1;i<=n;i++)li[i]=false;
 
	for(int i=n;i>=1;i--){
		if(!li[i]){
			k++;
			if(p[i]!=i)fr=i;
 
			mins=n; maxs=1;
			dfs(i);
 
			where[k]={mins,maxs};
			pref[mins]++; pref[maxs]--;
		}
	}
	ans/=2;

	/// more steps inside initial cycle
 
	if(s!=1){
      int from=s,to=s,ll=s,rr=s;
		while(ll>=from or rr<=to){
			while(ll>=from){
				from=min(from,where[cycle[ll]].first);
				to=max(to,where[cycle[ll]].second);
				ll--;
			}
 
			while(rr<=to){
				from=min(from,where[cycle[rr]].first);
				to=max(to,where[cycle[rr]].second);
				rr++;
			}
		}
      ans+=ff(from,to);
    }else{
		for(int i=1;i<=n-1;i++){
			curr+=pref[i];
			if(i<s)continue;
	
			if(curr==0 and last>i)ans+=2;
		}
	
		curr=0;
		for(int i=n;i>=2;i--){
			curr+=pref[i];
			if(i>s)continue;
	
			if(curr==0 and fr<i)ans+=2;
		}
	}
	
	return ans;
}
 
/*int main(){
 
	vector<int> perm;
	for(int i=0;i<10;i++){
		perm.push_back(i);
	}
 
	while(true){
		random_shuffle(perm.begin(),perm.end());
		for(int i=0;i<10;i++){
			cout<<perm[i]<<" ";
		}
		cout<<"\n";
 
		int z=rand()%10;
 
		cout<<z<<"\n";
		minimum_walk(perm,z);
	}
 
	return 0;
}*/

Subtask #1
12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	8528 KB	Output is correct
2	Correct	2 ms	8528 KB	Output is correct
3	Correct	2 ms	8528 KB	Output is correct
4	Correct	2 ms	8528 KB	Output is correct
5	Correct	1 ms	8528 KB	Output is correct
6	Correct	2 ms	8528 KB	Output is correct
7	Correct	1 ms	8528 KB	Output is correct
8	Correct	2 ms	8528 KB	Output is correct
9	Correct	1 ms	8528 KB	Output is correct
10	Correct	2 ms	8528 KB	Output is correct
11	Correct	2 ms	8528 KB	Output is correct
12	Correct	2 ms	8528 KB	Output is correct
13	Correct	2 ms	8528 KB	Output is correct
14	Correct	1 ms	8528 KB	Output is correct
15	Correct	1 ms	8528 KB	Output is correct
16	Correct	1 ms	8528 KB	Output is correct
17	Correct	1 ms	8528 KB	Output is correct
18	Correct	1 ms	8528 KB	Output is correct

Subtask #2
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	8528 KB	Output is correct
2	Correct	2 ms	8528 KB	Output is correct
3	Correct	2 ms	8528 KB	Output is correct
4	Correct	2 ms	8528 KB	Output is correct
5	Correct	1 ms	8528 KB	Output is correct
6	Correct	2 ms	8528 KB	Output is correct
7	Correct	1 ms	8528 KB	Output is correct
8	Correct	2 ms	8528 KB	Output is correct
9	Correct	1 ms	8528 KB	Output is correct
10	Correct	2 ms	8528 KB	Output is correct
11	Correct	2 ms	8528 KB	Output is correct
12	Correct	2 ms	8528 KB	Output is correct
13	Correct	2 ms	8528 KB	Output is correct
14	Correct	1 ms	8528 KB	Output is correct
15	Correct	1 ms	8528 KB	Output is correct
16	Correct	1 ms	8528 KB	Output is correct
17	Correct	1 ms	8528 KB	Output is correct
18	Correct	1 ms	8528 KB	Output is correct
19	Correct	1 ms	8700 KB	Output is correct
20	Correct	1 ms	8528 KB	Output is correct
21	Correct	1 ms	8528 KB	Output is correct
22	Correct	1 ms	8528 KB	Output is correct
23	Correct	1 ms	8528 KB	Output is correct
24	Correct	1 ms	8528 KB	Output is correct
25	Correct	1 ms	8528 KB	Output is correct
26	Correct	1 ms	8528 KB	Output is correct
27	Correct	1 ms	8528 KB	Output is correct
28	Correct	1 ms	8528 KB	Output is correct
29	Correct	1 ms	8528 KB	Output is correct

Subtask #3
28.0 / 28.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	8528 KB	Output is correct
2	Correct	2 ms	8528 KB	Output is correct
3	Correct	2 ms	8528 KB	Output is correct
4	Correct	2 ms	8528 KB	Output is correct
5	Correct	1 ms	8528 KB	Output is correct
6	Correct	2 ms	8528 KB	Output is correct
7	Correct	1 ms	8528 KB	Output is correct
8	Correct	2 ms	8528 KB	Output is correct
9	Correct	1 ms	8528 KB	Output is correct
10	Correct	2 ms	8528 KB	Output is correct
11	Correct	2 ms	8528 KB	Output is correct
12	Correct	2 ms	8528 KB	Output is correct
13	Correct	2 ms	8528 KB	Output is correct
14	Correct	1 ms	8528 KB	Output is correct
15	Correct	1 ms	8528 KB	Output is correct
16	Correct	1 ms	8528 KB	Output is correct
17	Correct	1 ms	8528 KB	Output is correct
18	Correct	1 ms	8528 KB	Output is correct
19	Correct	1 ms	8700 KB	Output is correct
20	Correct	1 ms	8528 KB	Output is correct
21	Correct	1 ms	8528 KB	Output is correct
22	Correct	1 ms	8528 KB	Output is correct
23	Correct	1 ms	8528 KB	Output is correct
24	Correct	1 ms	8528 KB	Output is correct
25	Correct	1 ms	8528 KB	Output is correct
26	Correct	1 ms	8528 KB	Output is correct
27	Correct	1 ms	8528 KB	Output is correct
28	Correct	1 ms	8528 KB	Output is correct
29	Correct	1 ms	8528 KB	Output is correct
30	Correct	105 ms	23300 KB	Output is correct
31	Correct	105 ms	23112 KB	Output is correct
32	Correct	75 ms	29264 KB	Output is correct
33	Correct	83 ms	27208 KB	Output is correct
34	Correct	82 ms	27208 KB	Output is correct
35	Correct	86 ms	27208 KB	Output is correct
36	Correct	85 ms	25344 KB	Output is correct
37	Correct	76 ms	23296 KB	Output is correct
38	Correct	75 ms	23296 KB	Output is correct
39	Correct	76 ms	23112 KB	Output is correct
40	Correct	79 ms	23124 KB	Output is correct
41	Correct	101 ms	23112 KB	Output is correct
42	Correct	103 ms	23112 KB	Output is correct
43	Correct	89 ms	29436 KB	Output is correct

Subtask #4
0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	4 ms	12112 KB	Output is correct
2	Correct	2 ms	10576 KB	Output is correct
3	Incorrect	4 ms	11600 KB	3rd lines differ - on the 1st token, expected: '5920', found: '5922'
4	Halted	0 ms	0 KB	-

Subtask #5
0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	8528 KB	Output is correct
2	Correct	2 ms	8528 KB	Output is correct
3	Correct	2 ms	8528 KB	Output is correct
4	Correct	2 ms	8528 KB	Output is correct
5	Correct	1 ms	8528 KB	Output is correct
6	Correct	2 ms	8528 KB	Output is correct
7	Correct	1 ms	8528 KB	Output is correct
8	Correct	2 ms	8528 KB	Output is correct
9	Correct	1 ms	8528 KB	Output is correct
10	Correct	2 ms	8528 KB	Output is correct
11	Correct	2 ms	8528 KB	Output is correct
12	Correct	2 ms	8528 KB	Output is correct
13	Correct	2 ms	8528 KB	Output is correct
14	Correct	1 ms	8528 KB	Output is correct
15	Correct	1 ms	8528 KB	Output is correct
16	Correct	1 ms	8528 KB	Output is correct
17	Correct	1 ms	8528 KB	Output is correct
18	Correct	1 ms	8528 KB	Output is correct
19	Correct	1 ms	8700 KB	Output is correct
20	Correct	1 ms	8528 KB	Output is correct
21	Correct	1 ms	8528 KB	Output is correct
22	Correct	1 ms	8528 KB	Output is correct
23	Correct	1 ms	8528 KB	Output is correct
24	Correct	1 ms	8528 KB	Output is correct
25	Correct	1 ms	8528 KB	Output is correct
26	Correct	1 ms	8528 KB	Output is correct
27	Correct	1 ms	8528 KB	Output is correct
28	Correct	1 ms	8528 KB	Output is correct
29	Correct	1 ms	8528 KB	Output is correct
30	Correct	105 ms	23300 KB	Output is correct
31	Correct	105 ms	23112 KB	Output is correct
32	Correct	75 ms	29264 KB	Output is correct
33	Correct	83 ms	27208 KB	Output is correct
34	Correct	82 ms	27208 KB	Output is correct
35	Correct	86 ms	27208 KB	Output is correct
36	Correct	85 ms	25344 KB	Output is correct
37	Correct	76 ms	23296 KB	Output is correct
38	Correct	75 ms	23296 KB	Output is correct
39	Correct	76 ms	23112 KB	Output is correct
40	Correct	79 ms	23124 KB	Output is correct
41	Correct	101 ms	23112 KB	Output is correct
42	Correct	103 ms	23112 KB	Output is correct
43	Correct	89 ms	29436 KB	Output is correct
44	Correct	4 ms	12112 KB	Output is correct
45	Correct	2 ms	10576 KB	Output is correct
46	Incorrect	4 ms	11600 KB	3rd lines differ - on the 1st token, expected: '5920', found: '5922'
47	Halted	0 ms	0 KB	-

Submission #1105054

Compilation message

Subtask #1 12.0 / 12.0

Subtask #2 10.0 / 10.0

Subtask #3 28.0 / 28.0

Subtask #4 0 / 20.0

Subtask #5 0 / 30.0

Subtask #1
12.0 / 12.0

Subtask #2
10.0 / 10.0

Subtask #3
28.0 / 28.0

Subtask #4
0 / 20.0

Subtask #5
0 / 30.0