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답안 #411905

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
411905 2021-05-26T08:22:53 Z Ruxandra985 Village (BOI20_village) C++14
50 / 100
 108 ms 16576 KB 
#include <bits/stdc++.h>
#define DIMN 100010
using namespace std;
int n , mini , maxi , fth , centroid;
int which[DIMN] , wm[DIMN] , sub[DIMN] , under[DIMN];
vector <int> v[DIMN] , su , supra;

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 tt){
    int i , vecin;


    for (i = 0 ; i < v[nod].size() ; i++){
        vecin = v[nod][i];
        if (vecin != tt){
            dfs2 (vecin , nod);

            under[vecin] = 1;

        }
    }
}


int main()
{
    FILE *fin = stdin;
    FILE *fout = stdout;
    int x , y , i;
    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 %d\n" , mini , maxi);

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

    fprintf (fout,"\n");

    dfs2 (centroid , fth);

    for (i = 1 ; i <= n ; i++){
        if (under[i])
            su.push_back(i);
        else if (i != centroid)
            supra.push_back(i);
    }

    while (!su.empty() && !supra.empty()){
        swap(wm[su.back()] , wm[supra.back()]);
        su.pop_back();
        supra.pop_back();
    }

    if (su.empty() && supra.empty()){
        for (i = 0 ; i < v[centroid].size() ; i++){
            int vecin = v[centroid][i];
            swap(wm[centroid] , wm[vecin]);
            break;
        }
    }
    else if (!su.empty()){
        swap(wm[centroid] , wm[su.back()]);
    }
    else {
        swap(wm[centroid] , wm[supra.back()]);
    }


    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:13:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |     for (i = 0 ; i < v[nod].size() ; i++){
      |                  ~~^~~~~~~~~~~~~~~
Village.cpp:42:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |             for (i = 0 ; i < v[nod].size() ; i++){
      |                          ~~^~~~~~~~~~~~~~~
Village.cpp: In function 'void dfs2(int, int)':
Village.cpp:62:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |     for (i = 0 ; i < v[nod].size() ; i++){
      |                  ~~^~~~~~~~~~~~~~~
Village.cpp: In function 'int main()':
Village.cpp:120:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  120 |         for (i = 0 ; i < v[centroid].size() ; i++){
      |                      ~~^~~~~~~~~~~~~~~~~~~~
Village.cpp:79:12: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   79 |     fscanf (fin,"%d",&n);
      |     ~~~~~~~^~~~~~~~~~~~~
Village.cpp:81:16: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   81 |         fscanf (fin,"%d%d",&x,&y);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
6.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Partially correct 2 ms 2636 KB Partially correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 2 ms 2636 KB Output is correct
7 Partially correct 2 ms 2636 KB Partially correct
8 Correct 2 ms 2636 KB Output is correct
9 Partially correct 2 ms 2636 KB Partially correct
10 Partially correct 2 ms 2636 KB Partially correct
11 Correct 2 ms 2636 KB Output is correct
12 Correct 2 ms 2636 KB Output is correct
13 Partially correct 3 ms 2560 KB Partially correct
14 Partially correct 2 ms 2636 KB Partially correct
15 Correct 2 ms 2636 KB Output is correct
16 Partially correct 2 ms 2636 KB Partially correct
17 Partially correct 2 ms 2636 KB Partially correct

Subtask #2
19.0 / 38.0

# 결과 실행 시간 메모리 Grader output
1 Partially correct 2 ms 2636 KB Partially correct
2 Partially correct 3 ms 2636 KB Partially correct
3 Partially correct 3 ms 2644 KB Partially correct
4 Partially correct 4 ms 2636 KB Partially correct
5 Partially correct 3 ms 2636 KB Partially correct
6 Partially correct 3 ms 2636 KB Partially correct
7 Correct 3 ms 2764 KB Output is correct
8 Partially correct 3 ms 2636 KB Partially correct
9 Partially correct 3 ms 2636 KB Partially correct
10 Correct 3 ms 2764 KB Output is correct
11 Partially correct 3 ms 2636 KB Partially correct
12 Partially correct 3 ms 2636 KB Partially correct
13 Partially correct 3 ms 2636 KB Partially correct
14 Partially correct 3 ms 2636 KB Partially correct
15 Partially correct 3 ms 2636 KB Partially correct
16 Partially correct 3 ms 2636 KB Partially correct
17 Partially correct 3 ms 2636 KB Partially correct
18 Partially correct 3 ms 2720 KB Partially correct
19 Partially correct 3 ms 2636 KB Partially correct
20 Partially correct 2 ms 2636 KB Partially correct
21 Partially correct 2 ms 2636 KB Partially correct
22 Partially correct 3 ms 2636 KB Partially correct
23 Partially correct 3 ms 2636 KB Partially correct
24 Partially correct 3 ms 2636 KB Partially correct
25 Correct 3 ms 2636 KB Output is correct
26 Partially correct 3 ms 2636 KB Partially correct
27 Correct 2 ms 2636 KB Output is correct
28 Partially correct 3 ms 2636 KB Partially correct
29 Partially correct 3 ms 2636 KB Partially correct
30 Partially correct 3 ms 2636 KB Partially correct

Subtask #3
25.0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Partially correct 2 ms 2636 KB Partially correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 2 ms 2636 KB Output is correct
7 Partially correct 2 ms 2636 KB Partially correct
8 Correct 2 ms 2636 KB Output is correct
9 Partially correct 2 ms 2636 KB Partially correct
10 Partially correct 2 ms 2636 KB Partially correct
11 Correct 2 ms 2636 KB Output is correct
12 Correct 2 ms 2636 KB Output is correct
13 Partially correct 3 ms 2560 KB Partially correct
14 Partially correct 2 ms 2636 KB Partially correct
15 Correct 2 ms 2636 KB Output is correct
16 Partially correct 2 ms 2636 KB Partially correct
17 Partially correct 2 ms 2636 KB Partially correct
18 Partially correct 2 ms 2636 KB Partially correct
19 Partially correct 3 ms 2636 KB Partially correct
20 Partially correct 3 ms 2644 KB Partially correct
21 Partially correct 4 ms 2636 KB Partially correct
22 Partially correct 3 ms 2636 KB Partially correct
23 Partially correct 3 ms 2636 KB Partially correct
24 Correct 3 ms 2764 KB Output is correct
25 Partially correct 3 ms 2636 KB Partially correct
26 Partially correct 3 ms 2636 KB Partially correct
27 Correct 3 ms 2764 KB Output is correct
28 Partially correct 3 ms 2636 KB Partially correct
29 Partially correct 3 ms 2636 KB Partially correct
30 Partially correct 3 ms 2636 KB Partially correct
31 Partially correct 3 ms 2636 KB Partially correct
32 Partially correct 3 ms 2636 KB Partially correct
33 Partially correct 3 ms 2636 KB Partially correct
34 Partially correct 3 ms 2636 KB Partially correct
35 Partially correct 3 ms 2720 KB Partially correct
36 Partially correct 3 ms 2636 KB Partially correct
37 Partially correct 2 ms 2636 KB Partially correct
38 Partially correct 2 ms 2636 KB Partially correct
39 Partially correct 3 ms 2636 KB Partially correct
40 Partially correct 3 ms 2636 KB Partially correct
41 Partially correct 3 ms 2636 KB Partially correct
42 Correct 3 ms 2636 KB Output is correct
43 Partially correct 3 ms 2636 KB Partially correct
44 Correct 2 ms 2636 KB Output is correct
45 Partially correct 3 ms 2636 KB Partially correct
46 Partially correct 3 ms 2636 KB Partially correct
47 Partially correct 3 ms 2636 KB Partially correct
48 Partially correct 86 ms 8472 KB Partially correct
49 Partially correct 80 ms 9280 KB Partially correct
50 Partially correct 85 ms 9120 KB Partially correct
51 Partially correct 62 ms 7652 KB Partially correct
52 Partially correct 82 ms 9108 KB Partially correct
53 Partially correct 74 ms 8360 KB Partially correct
54 Correct 40 ms 9332 KB Output is correct
55 Partially correct 90 ms 16576 KB Partially correct
56 Partially correct 108 ms 12608 KB Partially correct
57 Partially correct 88 ms 11440 KB Partially correct
58 Correct 98 ms 10384 KB Output is correct
59 Partially correct 83 ms 9264 KB Partially correct
60 Partially correct 64 ms 9016 KB Partially correct
61 Partially correct 64 ms 9020 KB Partially correct
62 Partially correct 72 ms 9460 KB Partially correct
63 Partially correct 67 ms 9080 KB Partially correct
64 Partially correct 82 ms 9532 KB Partially correct
65 Partially correct 81 ms 9580 KB Partially correct
66 Partially correct 69 ms 8916 KB Partially correct
67 Partially correct 52 ms 7368 KB Partially correct
68 Partially correct 62 ms 8652 KB Partially correct
69 Partially correct 71 ms 9532 KB Partially correct
70 Partially correct 64 ms 9012 KB Partially correct
71 Partially correct 48 ms 7488 KB Partially correct
72 Partially correct 65 ms 8076 KB Partially correct
73 Partially correct 68 ms 9532 KB Partially correct
74 Partially correct 79 ms 9176 KB Partially correct
75 Partially correct 80 ms 9060 KB Partially correct
76 Partially correct 103 ms 9020 KB Partially correct
77 Partially correct 72 ms 9212 KB Partially correct
78 Partially correct 60 ms 7048 KB Partially correct
79 Partially correct 54 ms 7748 KB Partially correct
80 Partially correct 79 ms 9068 KB Partially correct
81 Partially correct 102 ms 9280 KB Partially correct
82 Partially correct 70 ms 9364 KB Partially correct