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Submission #343005

# Submission time Handle Problem Language Result Execution time Memory
343005 2021-01-03T10:49:09 Z mjhmjh1104 Village (BOI20_village) C++14
50 / 100
 137 ms 24300 KB 
#include <cstdio>
#include <vector>
#include <algorithm>
using namespace std;

const int MAX = 100006;

int n, maxDepth[MAX], depth[MAX], childs[MAX];
vector<int> adj[MAX], c[MAX];
int nextShort[MAX], e[MAX], resShort;
int nextLong[MAX];
long long resLong;
bool visited[MAX];

void dfs(int x, int prev = -1) {
    for (auto &i: adj[x]) if (i != prev) {
        c[x].push_back(i);
        dfs(i, x);
    }
}

void dfsShort(int x) {
    e[x] = x;
    vector<int> zero;
    for (auto &i: c[x]) {
        if (!childs[i]) zero.push_back(i), e[x] = i;
        else {
            dfsShort(i);
            if (childs[i]) childs[x]--;
            else zero.push_back(i), e[x] = i;
        }
    }
    if (!childs[x]) return;
    if (zero.empty()) return;
    nextShort[x] = zero[0];
    for (int i = 0; i < (int)zero.size(); i++) {
        if (i != (int)zero.size() - 1) nextShort[zero[i]] = zero[i + 1];
        else nextShort[zero[i]] = x;
        resShort += 2;
    }
}

void depthFrom(int x, int prev = -1) {
    maxDepth[x] = depth[x];
    for (auto &i: adj[x]) if (i != prev && !visited[i]) {
        depth[i] = depth[x] + 1;
        depthFrom(i, x);
        maxDepth[x] = max(maxDepth[x], maxDepth[i]);
    }
}

pair<int, int> farthest(int x, int prev = -1) {
    for (auto &i: adj[x]) if (i != prev && !visited[i]) {
        if (maxDepth[i] == maxDepth[x]) {
            pair<int, int> t = farthest(i, x);
            return { t.first, t.second + 1 };
        }
    }
    return { x, 0 };
}

int main() {
    scanf("%d", &n);
    fill(nextShort, nextShort + n, -1);
    for (int i = 0; i < n - 1; i++) {
        int u, v;
        scanf("%d%d", &u, &v);
        u--, v--;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    dfs(0);
    for (int i = 0; i < n; i++) childs[i] = (int)c[i].size();
    dfsShort(0);
    if (nextShort[0] == -1) {
        nextShort[0] = c[0][0];
        nextShort[e[c[0][0]]] = 0;
        resShort += 2;
    }
    if (n > 1000) {
        printf("%d 0\n", resShort);
        for (int i = 0; i < n; i++) printf("%d ", nextShort[i] + 1);
        puts("");
        for (int i = 0; i < n - 1; i++) printf("%d ", i + 2);
        printf("1");
        return 0;
    }
    visited[0] = true;
    int k = 0;
    for (int i = 0; i < n - 1; i++) {
        depth[k] = 0;
        depthFrom(k);
        pair<int, int> t = farthest(k);
        nextLong[k] = t.first;
        resLong += t.second;
        k = t.first;
        visited[k] = true;
    }
    for (int i = 0; i < n; i++) visited[i] = false;
    depth[k] = 0;
    depthFrom(k);
    nextLong[k] = 0;
    resLong += depth[0];
    printf("%d %lld\n", resShort, resLong);
    for (int i = 0; i < n; i++) printf("%d ", nextShort[i] + 1);
    puts("");
    for (int i = 0; i < n; i++) printf("%d ", nextLong[i] + 1);
}

Compilation message

Village.cpp: In function 'int main()':
Village.cpp:63:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   63 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
Village.cpp:67:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   67 |         scanf("%d%d", &u, &v);
      |         ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
6.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4972 KB Output is correct
2 Correct 3 ms 4972 KB Output is correct
3 Correct 3 ms 4972 KB Output is correct
4 Partially correct 3 ms 4972 KB Partially correct
5 Partially correct 3 ms 4972 KB Partially correct
6 Partially correct 3 ms 4972 KB Partially correct
7 Correct 3 ms 4972 KB Output is correct
8 Correct 3 ms 4972 KB Output is correct
9 Correct 4 ms 4972 KB Output is correct
10 Partially correct 3 ms 4972 KB Partially correct
11 Correct 3 ms 4972 KB Output is correct
12 Partially correct 3 ms 4972 KB Partially correct
13 Partially correct 3 ms 4972 KB Partially correct
14 Correct 3 ms 4972 KB Output is correct
15 Partially correct 3 ms 4972 KB Partially correct
16 Partially correct 3 ms 4972 KB Partially correct
17 Partially correct 3 ms 4972 KB Partially correct

Subtask #2
19.0 / 38.0

# Verdict Execution time Memory Grader output
1 Partially correct 4 ms 5100 KB Partially correct
2 Partially correct 6 ms 5100 KB Partially correct
3 Correct 6 ms 5100 KB Output is correct
4 Partially correct 14 ms 5100 KB Partially correct
5 Partially correct 12 ms 5100 KB Partially correct
6 Partially correct 13 ms 5100 KB Partially correct
7 Partially correct 12 ms 5248 KB Partially correct
8 Partially correct 16 ms 5120 KB Partially correct
9 Partially correct 13 ms 5100 KB Partially correct
10 Correct 18 ms 5100 KB Output is correct
11 Correct 15 ms 5100 KB Output is correct
12 Correct 12 ms 5100 KB Output is correct
13 Correct 11 ms 5100 KB Output is correct
14 Correct 11 ms 5100 KB Output is correct
15 Correct 9 ms 5100 KB Output is correct
16 Partially correct 5 ms 5100 KB Partially correct
17 Partially correct 11 ms 5100 KB Partially correct
18 Correct 11 ms 5100 KB Output is correct
19 Correct 11 ms 5120 KB Output is correct
20 Correct 11 ms 5100 KB Output is correct
21 Correct 11 ms 5100 KB Output is correct
22 Correct 11 ms 5100 KB Output is correct
23 Partially correct 12 ms 5100 KB Partially correct
24 Partially correct 12 ms 5100 KB Partially correct
25 Partially correct 6 ms 5100 KB Partially correct
26 Partially correct 14 ms 5100 KB Partially correct
27 Correct 6 ms 5100 KB Output is correct
28 Partially correct 15 ms 5100 KB Partially correct
29 Correct 12 ms 5100 KB Output is correct
30 Partially correct 9 ms 5100 KB Partially correct

Subtask #3
25.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4972 KB Output is correct
2 Correct 3 ms 4972 KB Output is correct
3 Correct 3 ms 4972 KB Output is correct
4 Partially correct 3 ms 4972 KB Partially correct
5 Partially correct 3 ms 4972 KB Partially correct
6 Partially correct 3 ms 4972 KB Partially correct
7 Correct 3 ms 4972 KB Output is correct
8 Correct 3 ms 4972 KB Output is correct
9 Correct 4 ms 4972 KB Output is correct
10 Partially correct 3 ms 4972 KB Partially correct
11 Correct 3 ms 4972 KB Output is correct
12 Partially correct 3 ms 4972 KB Partially correct
13 Partially correct 3 ms 4972 KB Partially correct
14 Correct 3 ms 4972 KB Output is correct
15 Partially correct 3 ms 4972 KB Partially correct
16 Partially correct 3 ms 4972 KB Partially correct
17 Partially correct 3 ms 4972 KB Partially correct
18 Partially correct 4 ms 5100 KB Partially correct
19 Partially correct 6 ms 5100 KB Partially correct
20 Correct 6 ms 5100 KB Output is correct
21 Partially correct 14 ms 5100 KB Partially correct
22 Partially correct 12 ms 5100 KB Partially correct
23 Partially correct 13 ms 5100 KB Partially correct
24 Partially correct 12 ms 5248 KB Partially correct
25 Partially correct 16 ms 5120 KB Partially correct
26 Partially correct 13 ms 5100 KB Partially correct
27 Correct 18 ms 5100 KB Output is correct
28 Correct 15 ms 5100 KB Output is correct
29 Correct 12 ms 5100 KB Output is correct
30 Correct 11 ms 5100 KB Output is correct
31 Correct 11 ms 5100 KB Output is correct
32 Correct 9 ms 5100 KB Output is correct
33 Partially correct 5 ms 5100 KB Partially correct
34 Partially correct 11 ms 5100 KB Partially correct
35 Correct 11 ms 5100 KB Output is correct
36 Correct 11 ms 5120 KB Output is correct
37 Correct 11 ms 5100 KB Output is correct
38 Correct 11 ms 5100 KB Output is correct
39 Correct 11 ms 5100 KB Output is correct
40 Partially correct 12 ms 5100 KB Partially correct
41 Partially correct 12 ms 5100 KB Partially correct
42 Partially correct 6 ms 5100 KB Partially correct
43 Partially correct 14 ms 5100 KB Partially correct
44 Correct 6 ms 5100 KB Output is correct
45 Partially correct 15 ms 5100 KB Partially correct
46 Correct 12 ms 5100 KB Output is correct
47 Partially correct 9 ms 5100 KB Partially correct
48 Partially correct 86 ms 11568 KB Partially correct
49 Partially correct 99 ms 12268 KB Partially correct
50 Partially correct 97 ms 12140 KB Partially correct
51 Partially correct 70 ms 10604 KB Partially correct
52 Partially correct 111 ms 12140 KB Partially correct
53 Partially correct 91 ms 11372 KB Partially correct
54 Partially correct 63 ms 14188 KB Partially correct
55 Partially correct 121 ms 24300 KB Partially correct
56 Partially correct 122 ms 18028 KB Partially correct
57 Partially correct 137 ms 16108 KB Partially correct
58 Partially correct 117 ms 14444 KB Partially correct
59 Partially correct 103 ms 12140 KB Partially correct
60 Partially correct 63 ms 10980 KB Partially correct
61 Partially correct 72 ms 11340 KB Partially correct
62 Partially correct 83 ms 11372 KB Partially correct
63 Partially correct 69 ms 11116 KB Partially correct
64 Partially correct 81 ms 11628 KB Partially correct
65 Partially correct 71 ms 11628 KB Partially correct
66 Partially correct 63 ms 11116 KB Partially correct
67 Partially correct 48 ms 9720 KB Partially correct
68 Partially correct 62 ms 10604 KB Partially correct
69 Partially correct 70 ms 11884 KB Partially correct
70 Partially correct 67 ms 11372 KB Partially correct
71 Partially correct 48 ms 9808 KB Partially correct
72 Partially correct 57 ms 10220 KB Partially correct
73 Partially correct 68 ms 11756 KB Partially correct
74 Partially correct 65 ms 11116 KB Partially correct
75 Partially correct 102 ms 12140 KB Partially correct
76 Partially correct 96 ms 11500 KB Partially correct
77 Partially correct 91 ms 11628 KB Partially correct
78 Partially correct 54 ms 9324 KB Partially correct
79 Partially correct 68 ms 9964 KB Partially correct
80 Partially correct 96 ms 12140 KB Partially correct
81 Partially correct 78 ms 11756 KB Partially correct
82 Partially correct 67 ms 11372 KB Partially correct