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Submission #835895

# Submission time Handle Problem Language Result Execution time Memory
835895 2023-08-23T22:13:57 Z jasmin Ancient Books (IOI17_books) C++17
50 / 100
 281 ms 50252 KB 
//#include "books.h"
#include<bits/stdc++.h>
using namespace std;
 
const int INF=1e9+7;
 
long long minimum_walk(vector<int> p, int s) {
    int n=p.size();
	
    long long ans=0;
    
    vector<bool> vis(n, false);
    vector<bool> ends(n);
    vector<bool> starts(n);
    vector<int> cycle(n);
    set<pair<int,int> > ranges;
    for(int i=0; i<n; i++){
        if(vis[i]) continue;
 
        int v=i;
        int l=i;
        int r=i;
        int cnt=0;
        while(!vis[v]){
            vis[v]=true;
            cycle[v] = i;
 
            l=min(l, v);
            r=max(r, v);
            cnt++;
 
            ans += abs(p[v]-v);
            v=p[v];
        }
        ends[r] = true;
        starts[l] = true;
 
        if(cnt!=1 || i==s){
            ranges.insert({l, r});
        }
    }

    //start: 
    set<int> free;
    set<int> active;
    for(auto [l, r]: ranges){

        auto it=active.upper_bound(r);
        if(it==active.end()){

            free.insert(l);
            free.insert(r);

            active.insert(r);
        }
    }
    free.insert(s);

    int l=s; int r=s;
    vector<int> queue; queue.push_back(s);
    vis.assign(n, false);
    while(!free.empty()){

        if(!queue.empty()){
            int cur=queue.back();
            queue.pop_back();

            while(!vis[cur]){
                vis[cur]=true;
                free.erase(cur);

                l=min(l, cur);
                r=max(r, cur);

                cur = p[cur];
            }

            vector<int> neu;
            auto it=free.upper_bound(l);
            while(it!=free.end() && *it<r){

                neu.push_back(*it);
                it=next(it);
            }
            for(auto e: neu){
                queue.push_back(e);
                free.erase(e);
            }

        }
        else{

            auto itleft = free.upper_bound(l);
            int left=-1; int distleft=INF;
            if(itleft!=free.begin()){

                left = *prev(itleft);
                distleft = l-left;

            }
            
            auto itright = free.upper_bound(r);
            int right=-1; int distright = INF;
            if(itright!=free.end()){

                right = *itright;
                distright = right -r;
            }


            if((distleft <= distright || right==-1) && left!=-1){

                ans += 2*distleft;
                free.erase(left);
                queue.push_back(left);
            }
            else if(right!=-1){

                ans += 2*distright;
                free.erase(right);
                queue.push_back(right);
            }

        }

    }

    return ans;
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 1 ms 212 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 122 ms 12400 KB Output is correct
31 Correct 111 ms 12408 KB Output is correct
32 Correct 87 ms 12284 KB Output is correct
33 Correct 281 ms 47564 KB Output is correct
34 Correct 279 ms 47572 KB Output is correct
35 Correct 274 ms 50252 KB Output is correct
36 Correct 198 ms 35536 KB Output is correct
37 Correct 97 ms 15052 KB Output is correct
38 Correct 87 ms 12876 KB Output is correct
39 Correct 90 ms 12812 KB Output is correct
40 Correct 89 ms 12408 KB Output is correct
41 Correct 103 ms 12368 KB Output is correct
42 Correct 104 ms 12396 KB Output is correct
43 Correct 129 ms 24012 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB 3rd lines differ - on the 1st token, expected: '3304', found: '3594'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 122 ms 12400 KB Output is correct
31 Correct 111 ms 12408 KB Output is correct
32 Correct 87 ms 12284 KB Output is correct
33 Correct 281 ms 47564 KB Output is correct
34 Correct 279 ms 47572 KB Output is correct
35 Correct 274 ms 50252 KB Output is correct
36 Correct 198 ms 35536 KB Output is correct
37 Correct 97 ms 15052 KB Output is correct
38 Correct 87 ms 12876 KB Output is correct
39 Correct 90 ms 12812 KB Output is correct
40 Correct 89 ms 12408 KB Output is correct
41 Correct 103 ms 12368 KB Output is correct
42 Correct 104 ms 12396 KB Output is correct
43 Correct 129 ms 24012 KB Output is correct
44 Incorrect 0 ms 212 KB 3rd lines differ - on the 1st token, expected: '3304', found: '3594'
45 Halted 0 ms 0 KB -