Submission #1105069

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1105069	2024-10-25T09:26:13 Z	alexander707070	Ancient Books (IOI17_books)	C++14	50 / 100	115 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	8540 KB	Output is correct
3	Correct	1 ms	8528 KB	Output is correct
4	Correct	2 ms	8528 KB	Output is correct
5	Correct	2 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	2 ms	8528 KB	Output is correct
10	Correct	1 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	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	2 ms	8692 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	8540 KB	Output is correct
3	Correct	1 ms	8528 KB	Output is correct
4	Correct	2 ms	8528 KB	Output is correct
5	Correct	2 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	2 ms	8528 KB	Output is correct
10	Correct	1 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	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	2 ms	8692 KB	Output is correct
19	Correct	2 ms	8528 KB	Output is correct
20	Correct	2 ms	8528 KB	Output is correct
21	Correct	2 ms	8540 KB	Output is correct
22	Correct	2 ms	8528 KB	Output is correct
23	Correct	2 ms	8540 KB	Output is correct
24	Correct	2 ms	8652 KB	Output is correct
25	Correct	2 ms	8528 KB	Output is correct
26	Correct	2 ms	8528 KB	Output is correct
27	Correct	2 ms	8528 KB	Output is correct
28	Correct	2 ms	8528 KB	Output is correct
29	Correct	2 ms	8540 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	8540 KB	Output is correct
3	Correct	1 ms	8528 KB	Output is correct
4	Correct	2 ms	8528 KB	Output is correct
5	Correct	2 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	2 ms	8528 KB	Output is correct
10	Correct	1 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	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	2 ms	8692 KB	Output is correct
19	Correct	2 ms	8528 KB	Output is correct
20	Correct	2 ms	8528 KB	Output is correct
21	Correct	2 ms	8540 KB	Output is correct
22	Correct	2 ms	8528 KB	Output is correct
23	Correct	2 ms	8540 KB	Output is correct
24	Correct	2 ms	8652 KB	Output is correct
25	Correct	2 ms	8528 KB	Output is correct
26	Correct	2 ms	8528 KB	Output is correct
27	Correct	2 ms	8528 KB	Output is correct
28	Correct	2 ms	8528 KB	Output is correct
29	Correct	2 ms	8540 KB	Output is correct
30	Correct	115 ms	23292 KB	Output is correct
31	Correct	109 ms	23112 KB	Output is correct
32	Correct	81 ms	29436 KB	Output is correct
33	Correct	94 ms	27208 KB	Output is correct
34	Correct	89 ms	27208 KB	Output is correct
35	Correct	106 ms	27404 KB	Output is correct
36	Correct	93 ms	25344 KB	Output is correct
37	Correct	81 ms	23112 KB	Output is correct
38	Correct	84 ms	23112 KB	Output is correct
39	Correct	84 ms	23112 KB	Output is correct
40	Correct	100 ms	23292 KB	Output is correct
41	Correct	103 ms	23112 KB	Output is correct
42	Correct	94 ms	23112 KB	Output is correct
43	Correct	84 ms	29440 KB	Output is correct

Subtask #4
0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	4 ms	12112 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	8540 KB	Output is correct
3	Correct	1 ms	8528 KB	Output is correct
4	Correct	2 ms	8528 KB	Output is correct
5	Correct	2 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	2 ms	8528 KB	Output is correct
10	Correct	1 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	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	2 ms	8692 KB	Output is correct
19	Correct	2 ms	8528 KB	Output is correct
20	Correct	2 ms	8528 KB	Output is correct
21	Correct	2 ms	8540 KB	Output is correct
22	Correct	2 ms	8528 KB	Output is correct
23	Correct	2 ms	8540 KB	Output is correct
24	Correct	2 ms	8652 KB	Output is correct
25	Correct	2 ms	8528 KB	Output is correct
26	Correct	2 ms	8528 KB	Output is correct
27	Correct	2 ms	8528 KB	Output is correct
28	Correct	2 ms	8528 KB	Output is correct
29	Correct	2 ms	8540 KB	Output is correct
30	Correct	115 ms	23292 KB	Output is correct
31	Correct	109 ms	23112 KB	Output is correct
32	Correct	81 ms	29436 KB	Output is correct
33	Correct	94 ms	27208 KB	Output is correct
34	Correct	89 ms	27208 KB	Output is correct
35	Correct	106 ms	27404 KB	Output is correct
36	Correct	93 ms	25344 KB	Output is correct
37	Correct	81 ms	23112 KB	Output is correct
38	Correct	84 ms	23112 KB	Output is correct
39	Correct	84 ms	23112 KB	Output is correct
40	Correct	100 ms	23292 KB	Output is correct
41	Correct	103 ms	23112 KB	Output is correct
42	Correct	94 ms	23112 KB	Output is correct
43	Correct	84 ms	29440 KB	Output is correct
44	Incorrect	4 ms	12112 KB	3rd lines differ - on the 1st token, expected: '3304', found: '4058'
45	Halted	0 ms	0 KB	-

Submission #1105069

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