oj.uz

Submission #411938

# Submission time Handle Problem Language Result Execution time Memory
411938 2021-05-26T10:07:49 Z Ruxandra985 Village (BOI20_village) C++14
100 / 100
 121 ms 18948 KB 
#include <bits/stdc++.h>
#define DIMN 100010
using namespace std;
int n , mini , fth , centroid;
long long maxi;
int which[DIMN] , wm[DIMN] , sub[DIMN] , f[DIMN];
vector <int> v[DIMN] , w[DIMN];
priority_queue <pair <int , int> > h;

void dfs (int nod , int tt){
    int i , vecin , ok = 1;



    for (i = 0 ; i < v[nod].size() ; i++){
        vecin = v[nod][i];
        if (vecin != tt){
            dfs (vecin , nod);
            sub[nod] += sub[vecin] + 1;

            if (sub[vecin] + 1 > n / 2)
                ok = 0;

        }
    }

    if (n - sub[nod] - 1 > n / 2)
        ok = 0;

    if (ok && !centroid){
        centroid = nod;
        fth = tt;
    }

    maxi = maxi + 2 * min(sub[nod] + 1 , n - 1 - sub[nod]);

    if (which[nod] == nod){ /// nu l ai schimbat inca

        if (tt){
            swap(which[nod] , which[tt]);
            mini += 2;
        }
        else {
            for (i = 0 ; i < v[nod].size() ; i++){
                vecin = v[nod][i];
                if (vecin != tt){

                    swap(which[vecin] , which[nod]);
                    mini += 2;
                    break;

                }
            }
        }

    }

}

void dfs2 (int nod , int poz){
    int i , vecin;

    f[nod] = 1;


    if (nod != centroid)
        w[poz].push_back(nod);

    for (i = 0 ; i < v[nod].size() ; i++){
        vecin = v[nod][i];
        if (!f[vecin]){

            if (nod == centroid)
                poz++;

            dfs2 (vecin , poz);

        }
    }
}

int main()
{
    FILE *fin = stdin;
    FILE *fout = stdout;
    int x , y , i , a , b , elem;
    fscanf (fin,"%d",&n);
    for (i = 1 ; i < n ; i++){
        fscanf (fin,"%d%d",&x,&y);
        v[x].push_back(y);
        v[y].push_back(x);
    }

    /// solve pentru minim

    mini = 0;

    for (i = 1 ; i <= n ; i++){
        which[i] = i; /// ce nod e acum in locul in care se afla nodul i?
        wm[i] = i;
    }

    dfs (1 , 0);

    fprintf (fout,"%d %lld\n" , mini , maxi);

    for (i = 1 ; i <= n ; i++)
        fprintf (fout,"%d ",which[i]);

    fprintf (fout,"\n");

    dfs2 (centroid , 0);

    a = 1;
    b = 2;

    elem = v[centroid].size();

    for (i = 1 ; i <= elem ; i++)
        h.push(make_pair(w[i].size() , i));

    while (h.size() >= 2){

        a = h.top().second;
        h.pop();
        b = h.top().second;
        h.pop();

        swap(wm[w[a].back()] , wm[w[b].back()]);
        w[a].pop_back();
        w[b].pop_back();

        if (w[a].size())
            h.push(make_pair(w[a].size() , a));
        if (w[b].size())
            h.push(make_pair(w[b].size() , b));

    }

    if (h.empty()){
        if (centroid == 1){
            swap(wm[centroid] , wm[2]);
        }
        else swap(wm[centroid] , wm[centroid - 1]);
    }
    else {
        a = h.top().second;
        swap(wm[w[a].back()] , wm[centroid]);
    }

    for (i = 1 ; i <= n ; i++){
        fprintf (fout,"%d ",wm[i]);
    }

    return 0;
}

Compilation message

Village.cpp: In function 'void dfs(int, int)':
Village.cpp:15:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |     for (i = 0 ; i < v[nod].size() ; i++){
      |                  ~~^~~~~~~~~~~~~~~
Village.cpp:44:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |             for (i = 0 ; i < v[nod].size() ; i++){
      |                          ~~^~~~~~~~~~~~~~~
Village.cpp: In function 'void dfs2(int, int)':
Village.cpp:69:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   69 |     for (i = 0 ; i < v[nod].size() ; i++){
      |                  ~~^~~~~~~~~~~~~~~
Village.cpp: In function 'int main()':
Village.cpp:87:12: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   87 |     fscanf (fin,"%d",&n);
      |     ~~~~~~~^~~~~~~~~~~~~
Village.cpp:89:16: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   89 |         fscanf (fin,"%d%d",&x,&y);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 4 ms 4940 KB Output is correct
3 Correct 3 ms 4992 KB Output is correct
4 Correct 4 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct

Subtask #2
38.0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 4 ms 5036 KB Output is correct
4 Correct 4 ms 5068 KB Output is correct
5 Correct 4 ms 5068 KB Output is correct
6 Correct 5 ms 4940 KB Output is correct
7 Correct 4 ms 5012 KB Output is correct
8 Correct 4 ms 5068 KB Output is correct
9 Correct 4 ms 4940 KB Output is correct
10 Correct 4 ms 5068 KB Output is correct
11 Correct 4 ms 5072 KB Output is correct
12 Correct 4 ms 5068 KB Output is correct
13 Correct 4 ms 5068 KB Output is correct
14 Correct 5 ms 5068 KB Output is correct
15 Correct 4 ms 5068 KB Output is correct
16 Correct 4 ms 5068 KB Output is correct
17 Correct 4 ms 5068 KB Output is correct
18 Correct 4 ms 5068 KB Output is correct
19 Correct 4 ms 5068 KB Output is correct
20 Correct 4 ms 5068 KB Output is correct
21 Correct 4 ms 5068 KB Output is correct
22 Correct 4 ms 4940 KB Output is correct
23 Correct 4 ms 4940 KB Output is correct
24 Correct 4 ms 4940 KB Output is correct
25 Correct 4 ms 4940 KB Output is correct
26 Correct 4 ms 5068 KB Output is correct
27 Correct 4 ms 4940 KB Output is correct
28 Correct 4 ms 5068 KB Output is correct
29 Correct 4 ms 5068 KB Output is correct
30 Correct 4 ms 5068 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 4 ms 4940 KB Output is correct
3 Correct 3 ms 4992 KB Output is correct
4 Correct 4 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 3 ms 4940 KB Output is correct
16 Correct 3 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 3 ms 4940 KB Output is correct
20 Correct 4 ms 5036 KB Output is correct
21 Correct 4 ms 5068 KB Output is correct
22 Correct 4 ms 5068 KB Output is correct
23 Correct 5 ms 4940 KB Output is correct
24 Correct 4 ms 5012 KB Output is correct
25 Correct 4 ms 5068 KB Output is correct
26 Correct 4 ms 4940 KB Output is correct
27 Correct 4 ms 5068 KB Output is correct
28 Correct 4 ms 5072 KB Output is correct
29 Correct 4 ms 5068 KB Output is correct
30 Correct 4 ms 5068 KB Output is correct
31 Correct 5 ms 5068 KB Output is correct
32 Correct 4 ms 5068 KB Output is correct
33 Correct 4 ms 5068 KB Output is correct
34 Correct 4 ms 5068 KB Output is correct
35 Correct 4 ms 5068 KB Output is correct
36 Correct 4 ms 5068 KB Output is correct
37 Correct 4 ms 5068 KB Output is correct
38 Correct 4 ms 5068 KB Output is correct
39 Correct 4 ms 4940 KB Output is correct
40 Correct 4 ms 4940 KB Output is correct
41 Correct 4 ms 4940 KB Output is correct
42 Correct 4 ms 4940 KB Output is correct
43 Correct 4 ms 5068 KB Output is correct
44 Correct 4 ms 4940 KB Output is correct
45 Correct 4 ms 5068 KB Output is correct
46 Correct 4 ms 5068 KB Output is correct
47 Correct 4 ms 5068 KB Output is correct
48 Correct 83 ms 10928 KB Output is correct
49 Correct 88 ms 11504 KB Output is correct
50 Correct 100 ms 11580 KB Output is correct
51 Correct 68 ms 10136 KB Output is correct
52 Correct 95 ms 11492 KB Output is correct
53 Correct 96 ms 10840 KB Output is correct
54 Correct 45 ms 11664 KB Output is correct
55 Correct 107 ms 18948 KB Output is correct
56 Correct 96 ms 14864 KB Output is correct
57 Correct 106 ms 13668 KB Output is correct
58 Correct 95 ms 12612 KB Output is correct
59 Correct 89 ms 11560 KB Output is correct
60 Correct 85 ms 14816 KB Output is correct
61 Correct 88 ms 12096 KB Output is correct
62 Correct 84 ms 11708 KB Output is correct
63 Correct 75 ms 11400 KB Output is correct
64 Correct 113 ms 11764 KB Output is correct
65 Correct 84 ms 11948 KB Output is correct
66 Correct 79 ms 11428 KB Output is correct
67 Correct 61 ms 10296 KB Output is correct
68 Correct 69 ms 10920 KB Output is correct
69 Correct 88 ms 11872 KB Output is correct
70 Correct 86 ms 11464 KB Output is correct
71 Correct 55 ms 9796 KB Output is correct
72 Correct 60 ms 10452 KB Output is correct
73 Correct 82 ms 11964 KB Output is correct
74 Correct 75 ms 11348 KB Output is correct
75 Correct 121 ms 11328 KB Output is correct
76 Correct 97 ms 11336 KB Output is correct
77 Correct 99 ms 11532 KB Output is correct
78 Correct 74 ms 9428 KB Output is correct
79 Correct 77 ms 10180 KB Output is correct
80 Correct 97 ms 11284 KB Output is correct
81 Correct 93 ms 11732 KB Output is correct
82 Correct 84 ms 11708 KB Output is correct