oj.uz

Submission #254793

# Submission time Handle Problem Language Result Execution time Memory
254793 2020-07-30T15:30:10 Z model_code Village (BOI20_village) C++17
100 / 100
 116 ms 16956 KB 
#include <bits/stdc++.h>

using namespace std;

using ll = long long;

const int MAXN = 100000;
int n;

struct Vertex{
    vector<int> to;
    int sz;
}v[MAXN + 1];

ll smallest_distance, largest_distance;
int place_smallest[MAXN + 1];
int place_largest[MAXN + 1];
int group[MAXN + 1];
int groupsz[MAXN + 1];
int order[MAXN + 1];
int cnt[MAXN + 1];

void dfs(int it, int p = 0)
{
    v[it].sz = 1;

    for (auto t : v[it].to)
    {
        if (t == p)
            continue;
        dfs(t, it);
        v[it].sz += v[t].sz;
    }

    if (place_smallest[it] == it)
    {
        smallest_distance += 2;
        if (p != 0)
        {
            swap(place_smallest[it], place_smallest[p]);
        }
        else
        {
            swap(place_smallest[it], place_smallest[v[it].to.front()]);
        }
    }
}

int get_centroid()
{
    int it = 1;
    while (true)
    {
        int nxt = 0;
        for (auto t : v[it].to)
        {
            if (v[t].sz > v[it].sz)
                continue;
            if (v[t].sz * 2 > n)
            {
                nxt = t;
                break;
            }
        }
        if (nxt == 0)
            break;
        it = nxt;
    }
    return it;
}

int nextGroup = 0;
void dfsGroup(int it)
{
    group[it] = nextGroup;
    for (auto t : v[it].to)
    {
        if (group[t] != 0)
            continue;
        dfsGroup(t);
    }
}

int main()
{
    scanf("%d", &n);

    for (int i = 1; i < n; i++)
    {
        int a, b;
        scanf("%d %d", &a, &b);

        v[a].to.push_back(b);
        v[b].to.push_back(a);
    }

    for (int i = 1; i <= n; i++)
        place_smallest[i] = i;

    dfs(1);

    for (int i = 1; i <= n; i++)
    {
        largest_distance += 2 * min(v[i].sz, n - v[i].sz);
    }

    int centroid = get_centroid();
    group[centroid] = ++nextGroup;
    for (auto t : v[centroid].to)
    {
        ++nextGroup;
        dfsGroup(t);
    }

    for (int i = 1; i <= n; i++)
    {
        groupsz[group[i]]++;
    }

    for (int i = 1; i <= nextGroup; i++)
    {
        groupsz[i] += groupsz[i - 1];
    }

    for (int i = 1; i <= n; i++)
    {
        order[groupsz[group[i] - 1] + cnt[group[i]]++] = i;
    }

    for (int i = 0, j = n / 2; i < n; i++, j++)
    {
        if (j >= n)
            j = 0;
        place_largest[order[i]] = order[j];
    }

    printf("%lld %lld\n", smallest_distance, largest_distance);
    for (int i = 1; i <= n; i++)
        printf("%d ", place_smallest[i]);
    printf("\n");
    for (int i = 1; i <= n; i++)
        printf("%d ", place_largest[i]);
    printf("\n");
}

Compilation message

Village.cpp: In function 'int main()':
Village.cpp:86:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
Village.cpp:91:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &a, &b);
         ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3456 KB Output is correct
2 Correct 2 ms 3456 KB Output is correct
3 Correct 2 ms 3456 KB Output is correct
4 Correct 2 ms 3456 KB Output is correct
5 Correct 2 ms 3456 KB Output is correct
6 Correct 2 ms 3456 KB Output is correct
7 Correct 2 ms 3456 KB Output is correct
8 Correct 2 ms 3456 KB Output is correct
9 Correct 3 ms 3456 KB Output is correct
10 Correct 2 ms 3456 KB Output is correct
11 Correct 3 ms 3456 KB Output is correct
12 Correct 2 ms 3456 KB Output is correct
13 Correct 3 ms 3456 KB Output is correct
14 Correct 2 ms 3456 KB Output is correct
15 Correct 2 ms 3456 KB Output is correct
16 Correct 2 ms 3456 KB Output is correct
17 Correct 2 ms 3456 KB Output is correct

Subtask #2
38.0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3456 KB Output is correct
2 Correct 2 ms 3456 KB Output is correct
3 Correct 2 ms 3456 KB Output is correct
4 Correct 3 ms 3584 KB Output is correct
5 Correct 3 ms 3584 KB Output is correct
6 Correct 3 ms 3584 KB Output is correct
7 Correct 3 ms 3584 KB Output is correct
8 Correct 3 ms 3584 KB Output is correct
9 Correct 3 ms 3584 KB Output is correct
10 Correct 3 ms 3584 KB Output is correct
11 Correct 3 ms 3584 KB Output is correct
12 Correct 2 ms 3584 KB Output is correct
13 Correct 3 ms 3584 KB Output is correct
14 Correct 3 ms 3584 KB Output is correct
15 Correct 3 ms 3584 KB Output is correct
16 Correct 3 ms 3584 KB Output is correct
17 Correct 3 ms 3584 KB Output is correct
18 Correct 3 ms 3584 KB Output is correct
19 Correct 3 ms 3584 KB Output is correct
20 Correct 3 ms 3584 KB Output is correct
21 Correct 3 ms 3584 KB Output is correct
22 Correct 3 ms 3584 KB Output is correct
23 Correct 3 ms 3584 KB Output is correct
24 Correct 3 ms 3456 KB Output is correct
25 Correct 2 ms 3456 KB Output is correct
26 Correct 3 ms 3584 KB Output is correct
27 Correct 2 ms 3456 KB Output is correct
28 Correct 3 ms 3584 KB Output is correct
29 Correct 3 ms 3584 KB Output is correct
30 Correct 3 ms 3584 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3456 KB Output is correct
2 Correct 2 ms 3456 KB Output is correct
3 Correct 2 ms 3456 KB Output is correct
4 Correct 2 ms 3456 KB Output is correct
5 Correct 2 ms 3456 KB Output is correct
6 Correct 2 ms 3456 KB Output is correct
7 Correct 2 ms 3456 KB Output is correct
8 Correct 2 ms 3456 KB Output is correct
9 Correct 3 ms 3456 KB Output is correct
10 Correct 2 ms 3456 KB Output is correct
11 Correct 3 ms 3456 KB Output is correct
12 Correct 2 ms 3456 KB Output is correct
13 Correct 3 ms 3456 KB Output is correct
14 Correct 2 ms 3456 KB Output is correct
15 Correct 2 ms 3456 KB Output is correct
16 Correct 2 ms 3456 KB Output is correct
17 Correct 2 ms 3456 KB Output is correct
18 Correct 2 ms 3456 KB Output is correct
19 Correct 2 ms 3456 KB Output is correct
20 Correct 2 ms 3456 KB Output is correct
21 Correct 3 ms 3584 KB Output is correct
22 Correct 3 ms 3584 KB Output is correct
23 Correct 3 ms 3584 KB Output is correct
24 Correct 3 ms 3584 KB Output is correct
25 Correct 3 ms 3584 KB Output is correct
26 Correct 3 ms 3584 KB Output is correct
27 Correct 3 ms 3584 KB Output is correct
28 Correct 3 ms 3584 KB Output is correct
29 Correct 2 ms 3584 KB Output is correct
30 Correct 3 ms 3584 KB Output is correct
31 Correct 3 ms 3584 KB Output is correct
32 Correct 3 ms 3584 KB Output is correct
33 Correct 3 ms 3584 KB Output is correct
34 Correct 3 ms 3584 KB Output is correct
35 Correct 3 ms 3584 KB Output is correct
36 Correct 3 ms 3584 KB Output is correct
37 Correct 3 ms 3584 KB Output is correct
38 Correct 3 ms 3584 KB Output is correct
39 Correct 3 ms 3584 KB Output is correct
40 Correct 3 ms 3584 KB Output is correct
41 Correct 3 ms 3456 KB Output is correct
42 Correct 2 ms 3456 KB Output is correct
43 Correct 3 ms 3584 KB Output is correct
44 Correct 2 ms 3456 KB Output is correct
45 Correct 3 ms 3584 KB Output is correct
46 Correct 3 ms 3584 KB Output is correct
47 Correct 3 ms 3584 KB Output is correct
48 Correct 80 ms 8952 KB Output is correct
49 Correct 90 ms 9592 KB Output is correct
50 Correct 95 ms 9464 KB Output is correct
51 Correct 66 ms 8184 KB Output is correct
52 Correct 89 ms 9464 KB Output is correct
53 Correct 78 ms 8824 KB Output is correct
54 Correct 63 ms 9976 KB Output is correct
55 Correct 116 ms 16956 KB Output is correct
56 Correct 104 ms 12920 KB Output is correct
57 Correct 101 ms 11768 KB Output is correct
58 Correct 104 ms 10736 KB Output is correct
59 Correct 88 ms 9592 KB Output is correct
60 Correct 74 ms 10736 KB Output is correct
61 Correct 74 ms 9976 KB Output is correct
62 Correct 84 ms 9848 KB Output is correct
63 Correct 81 ms 9464 KB Output is correct
64 Correct 83 ms 9848 KB Output is correct
65 Correct 77 ms 9976 KB Output is correct
66 Correct 72 ms 9592 KB Output is correct
67 Correct 53 ms 8184 KB Output is correct
68 Correct 64 ms 8952 KB Output is correct
69 Correct 77 ms 10092 KB Output is correct
70 Correct 70 ms 9592 KB Output is correct
71 Correct 53 ms 7928 KB Output is correct
72 Correct 61 ms 8568 KB Output is correct
73 Correct 74 ms 9976 KB Output is correct
74 Correct 72 ms 9336 KB Output is correct
75 Correct 92 ms 9336 KB Output is correct
76 Correct 86 ms 9336 KB Output is correct
77 Correct 76 ms 9592 KB Output is correct
78 Correct 61 ms 7588 KB Output is correct
79 Correct 80 ms 8184 KB Output is correct
80 Correct 88 ms 9336 KB Output is correct
81 Correct 82 ms 9720 KB Output is correct
82 Correct 84 ms 9720 KB Output is correct