Submission #1105058

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1105058	2024-10-25T09:04:59 Z	alexander707070	Ancient Books (IOI17_books)	C++14	50 / 100	106 ms	29440 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<=fr and r>=last)return 0;
	
	if(vis[l][r])return dp[l][r];
	vis[l][r]=true;
	dp[l][r]=2*n;
 
	if(l>fr){
		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<last){
		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	2 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	8700 KB	Output is correct
5	Correct	2 ms	8528 KB	Output is correct
6	Correct	1 ms	8628 KB	Output is correct
7	Correct	1 ms	8528 KB	Output is correct
8	Correct	2 ms	8528 KB	Output is correct
9	Correct	2 ms	8528 KB	Output is correct
10	Correct	1 ms	8528 KB	Output is correct
11	Correct	2 ms	8696 KB	Output is correct
12	Correct	1 ms	8528 KB	Output is correct
13	Correct	2 ms	8528 KB	Output is correct
14	Correct	2 ms	8528 KB	Output is correct
15	Correct	2 ms	8528 KB	Output is correct
16	Correct	2 ms	8528 KB	Output is correct
17	Correct	2 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	2 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	8700 KB	Output is correct
5	Correct	2 ms	8528 KB	Output is correct
6	Correct	1 ms	8628 KB	Output is correct
7	Correct	1 ms	8528 KB	Output is correct
8	Correct	2 ms	8528 KB	Output is correct
9	Correct	2 ms	8528 KB	Output is correct
10	Correct	1 ms	8528 KB	Output is correct
11	Correct	2 ms	8696 KB	Output is correct
12	Correct	1 ms	8528 KB	Output is correct
13	Correct	2 ms	8528 KB	Output is correct
14	Correct	2 ms	8528 KB	Output is correct
15	Correct	2 ms	8528 KB	Output is correct
16	Correct	2 ms	8528 KB	Output is correct
17	Correct	2 ms	8528 KB	Output is correct
18	Correct	1 ms	8528 KB	Output is correct
19	Correct	2 ms	8528 KB	Output is correct
20	Correct	1 ms	8528 KB	Output is correct
21	Correct	2 ms	8528 KB	Output is correct
22	Correct	2 ms	8528 KB	Output is correct
23	Correct	2 ms	8632 KB	Output is correct
24	Correct	2 ms	8528 KB	Output is correct
25	Correct	1 ms	8528 KB	Output is correct
26	Correct	2 ms	8528 KB	Output is correct
27	Correct	1 ms	8528 KB	Output is correct
28	Correct	1 ms	8696 KB	Output is correct
29	Correct	2 ms	8696 KB	Output is correct

Subtask #3
28.0 / 28.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 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	8700 KB	Output is correct
5	Correct	2 ms	8528 KB	Output is correct
6	Correct	1 ms	8628 KB	Output is correct
7	Correct	1 ms	8528 KB	Output is correct
8	Correct	2 ms	8528 KB	Output is correct
9	Correct	2 ms	8528 KB	Output is correct
10	Correct	1 ms	8528 KB	Output is correct
11	Correct	2 ms	8696 KB	Output is correct
12	Correct	1 ms	8528 KB	Output is correct
13	Correct	2 ms	8528 KB	Output is correct
14	Correct	2 ms	8528 KB	Output is correct
15	Correct	2 ms	8528 KB	Output is correct
16	Correct	2 ms	8528 KB	Output is correct
17	Correct	2 ms	8528 KB	Output is correct
18	Correct	1 ms	8528 KB	Output is correct
19	Correct	2 ms	8528 KB	Output is correct
20	Correct	1 ms	8528 KB	Output is correct
21	Correct	2 ms	8528 KB	Output is correct
22	Correct	2 ms	8528 KB	Output is correct
23	Correct	2 ms	8632 KB	Output is correct
24	Correct	2 ms	8528 KB	Output is correct
25	Correct	1 ms	8528 KB	Output is correct
26	Correct	2 ms	8528 KB	Output is correct
27	Correct	1 ms	8528 KB	Output is correct
28	Correct	1 ms	8696 KB	Output is correct
29	Correct	2 ms	8696 KB	Output is correct
30	Correct	106 ms	23300 KB	Output is correct
31	Correct	103 ms	23296 KB	Output is correct
32	Correct	75 ms	29440 KB	Output is correct
33	Correct	87 ms	27208 KB	Output is correct
34	Correct	82 ms	27392 KB	Output is correct
35	Correct	86 ms	27384 KB	Output is correct
36	Correct	83 ms	25168 KB	Output is correct
37	Correct	76 ms	23112 KB	Output is correct
38	Correct	75 ms	23304 KB	Output is correct
39	Correct	75 ms	23112 KB	Output is correct
40	Correct	79 ms	23112 KB	Output is correct
41	Correct	106 ms	23112 KB	Output is correct
42	Correct	97 ms	23112 KB	Output is correct
43	Correct	90 ms	29256 KB	Output is correct

Subtask #4
0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	6 ms	12124 KB	3rd lines differ - on the 1st token, expected: '3304', found: '4058'
2	Halted	0 ms	0 KB	-

Subtask #5
0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 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	8700 KB	Output is correct
5	Correct	2 ms	8528 KB	Output is correct
6	Correct	1 ms	8628 KB	Output is correct
7	Correct	1 ms	8528 KB	Output is correct
8	Correct	2 ms	8528 KB	Output is correct
9	Correct	2 ms	8528 KB	Output is correct
10	Correct	1 ms	8528 KB	Output is correct
11	Correct	2 ms	8696 KB	Output is correct
12	Correct	1 ms	8528 KB	Output is correct
13	Correct	2 ms	8528 KB	Output is correct
14	Correct	2 ms	8528 KB	Output is correct
15	Correct	2 ms	8528 KB	Output is correct
16	Correct	2 ms	8528 KB	Output is correct
17	Correct	2 ms	8528 KB	Output is correct
18	Correct	1 ms	8528 KB	Output is correct
19	Correct	2 ms	8528 KB	Output is correct
20	Correct	1 ms	8528 KB	Output is correct
21	Correct	2 ms	8528 KB	Output is correct
22	Correct	2 ms	8528 KB	Output is correct
23	Correct	2 ms	8632 KB	Output is correct
24	Correct	2 ms	8528 KB	Output is correct
25	Correct	1 ms	8528 KB	Output is correct
26	Correct	2 ms	8528 KB	Output is correct
27	Correct	1 ms	8528 KB	Output is correct
28	Correct	1 ms	8696 KB	Output is correct
29	Correct	2 ms	8696 KB	Output is correct
30	Correct	106 ms	23300 KB	Output is correct
31	Correct	103 ms	23296 KB	Output is correct
32	Correct	75 ms	29440 KB	Output is correct
33	Correct	87 ms	27208 KB	Output is correct
34	Correct	82 ms	27392 KB	Output is correct
35	Correct	86 ms	27384 KB	Output is correct
36	Correct	83 ms	25168 KB	Output is correct
37	Correct	76 ms	23112 KB	Output is correct
38	Correct	75 ms	23304 KB	Output is correct
39	Correct	75 ms	23112 KB	Output is correct
40	Correct	79 ms	23112 KB	Output is correct
41	Correct	106 ms	23112 KB	Output is correct
42	Correct	97 ms	23112 KB	Output is correct
43	Correct	90 ms	29256 KB	Output is correct
44	Incorrect	6 ms	12124 KB	3rd lines differ - on the 1st token, expected: '3304', found: '4058'
45	Halted	0 ms	0 KB	-

Submission #1105058

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