Submission #73491

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
73491	2018-08-28T10:35:41 Z	mr_banana	Ancient Books (IOI17_books)	C++17	12 / 100	4 ms	636 KB

books

#include <bits/stdc++.h>
#include "books.h"

using namespace std;
const int MN=1e5+100;
int mark[MN];
vector<pair<int,pair<int,int> >  > e;
int par[MN];
int root(int x){
    return par[x]==x?x:par[x]=root(par[x]);
}
bool merg(int u,int v){
    u=root(u),v=root(v);
    if(u==v){
        return 0;
    }
    par[v]=u;
    return 1;
}
long long minimum_walk(std::vector<int> p, int s) {
    int n=p.size();
    long long ans=0;
    int cnt=0;
    for(int i=0;i<n;i++){
        ans+=abs(p[i]-i);
        if(!mark[i] && p[i]!=i){
            int x=i;
            do{
                mark[x]=cnt;
                x=p[x];
            }while(x!=i);
            cnt++;
        }
    }
    for(int i=0;i<n;i++){
        if(p[i]!=i){
            for(int j=i+1;j<n;j++){
                if(p[j]!=j){
                    e.push_back({j-i,{mark[i],mark[j]}});
                    break;
                }
            }
        }
    }
    sort(e.begin(),e.end());
    for(int i=0;i<e.size();i++){
        if(merg(e[i].second.first,e[i].second.second)){
            ans+=2*e[i].first;
        }
    }
    if(ans){
        for(int i=0;i<n;i++){
            if(p[i]==i){
                ans+=2;
            }
            else{
                break;
            }
        }
    }
	return ans;
}

Compilation message

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:46:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<e.size();i++){
                 ~^~~~~~~~~

Subtask #1

12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	248 KB	Output is correct
2	Correct	2 ms	356 KB	Output is correct
3	Correct	2 ms	436 KB	Output is correct
4	Correct	2 ms	508 KB	Output is correct
5	Correct	4 ms	508 KB	Output is correct
6	Correct	3 ms	508 KB	Output is correct
7	Correct	2 ms	508 KB	Output is correct
8	Correct	3 ms	544 KB	Output is correct
9	Correct	3 ms	544 KB	Output is correct
10	Correct	4 ms	544 KB	Output is correct
11	Correct	3 ms	592 KB	Output is correct
12	Correct	3 ms	592 KB	Output is correct
13	Correct	2 ms	592 KB	Output is correct
14	Correct	2 ms	592 KB	Output is correct
15	Correct	3 ms	628 KB	Output is correct
16	Correct	2 ms	628 KB	Output is correct
17	Correct	3 ms	636 KB	Output is correct
18	Correct	3 ms	636 KB	Output is correct

Subtask #2

0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	248 KB	Output is correct
2	Correct	2 ms	356 KB	Output is correct
3	Correct	2 ms	436 KB	Output is correct
4	Correct	2 ms	508 KB	Output is correct
5	Correct	4 ms	508 KB	Output is correct
6	Correct	3 ms	508 KB	Output is correct
7	Correct	2 ms	508 KB	Output is correct
8	Correct	3 ms	544 KB	Output is correct
9	Correct	3 ms	544 KB	Output is correct
10	Correct	4 ms	544 KB	Output is correct
11	Correct	3 ms	592 KB	Output is correct
12	Correct	3 ms	592 KB	Output is correct
13	Correct	2 ms	592 KB	Output is correct
14	Correct	2 ms	592 KB	Output is correct
15	Correct	3 ms	628 KB	Output is correct
16	Correct	2 ms	628 KB	Output is correct
17	Correct	3 ms	636 KB	Output is correct
18	Correct	3 ms	636 KB	Output is correct
19	Correct	2 ms	636 KB	Output is correct
20	Correct	3 ms	636 KB	Output is correct
21	Correct	2 ms	636 KB	Output is correct
22	Incorrect	2 ms	636 KB	3rd lines differ - on the 1st token, expected: '2082', found: '788'
23	Halted	0 ms	0 KB	-

Subtask #3

0 / 28.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	248 KB	Output is correct
2	Correct	2 ms	356 KB	Output is correct
3	Correct	2 ms	436 KB	Output is correct
4	Correct	2 ms	508 KB	Output is correct
5	Correct	4 ms	508 KB	Output is correct
6	Correct	3 ms	508 KB	Output is correct
7	Correct	2 ms	508 KB	Output is correct
8	Correct	3 ms	544 KB	Output is correct
9	Correct	3 ms	544 KB	Output is correct
10	Correct	4 ms	544 KB	Output is correct
11	Correct	3 ms	592 KB	Output is correct
12	Correct	3 ms	592 KB	Output is correct
13	Correct	2 ms	592 KB	Output is correct
14	Correct	2 ms	592 KB	Output is correct
15	Correct	3 ms	628 KB	Output is correct
16	Correct	2 ms	628 KB	Output is correct
17	Correct	3 ms	636 KB	Output is correct
18	Correct	3 ms	636 KB	Output is correct
19	Correct	2 ms	636 KB	Output is correct
20	Correct	3 ms	636 KB	Output is correct
21	Correct	2 ms	636 KB	Output is correct
22	Incorrect	2 ms	636 KB	3rd lines differ - on the 1st token, expected: '2082', found: '788'
23	Halted	0 ms	0 KB	-

Subtask #4

0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	3 ms	636 KB	3rd lines differ - on the 1st token, expected: '3304', found: '2744'
2	Halted	0 ms	0 KB	-

Subtask #5

0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	248 KB	Output is correct
2	Correct	2 ms	356 KB	Output is correct
3	Correct	2 ms	436 KB	Output is correct
4	Correct	2 ms	508 KB	Output is correct
5	Correct	4 ms	508 KB	Output is correct
6	Correct	3 ms	508 KB	Output is correct
7	Correct	2 ms	508 KB	Output is correct
8	Correct	3 ms	544 KB	Output is correct
9	Correct	3 ms	544 KB	Output is correct
10	Correct	4 ms	544 KB	Output is correct
11	Correct	3 ms	592 KB	Output is correct
12	Correct	3 ms	592 KB	Output is correct
13	Correct	2 ms	592 KB	Output is correct
14	Correct	2 ms	592 KB	Output is correct
15	Correct	3 ms	628 KB	Output is correct
16	Correct	2 ms	628 KB	Output is correct
17	Correct	3 ms	636 KB	Output is correct
18	Correct	3 ms	636 KB	Output is correct
19	Correct	2 ms	636 KB	Output is correct
20	Correct	3 ms	636 KB	Output is correct
21	Correct	2 ms	636 KB	Output is correct
22	Incorrect	2 ms	636 KB	3rd lines differ - on the 1st token, expected: '2082', found: '788'
23	Halted	0 ms	0 KB	-