oj.uz

Submission #723543

# Submission time Handle Problem Language Result Execution time Memory
723543 2023-04-14T04:50:55 Z t6twotwo Village (BOI20_village) C++17
100 / 100
 100 ms 23796 KB 
#include <bits/stdc++.h>
using namespace std;
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n;
    cin >> n;
    vector<vector<int>> adj(n);
    for (int i = 1; i < n; i++) {
        int x; cin >> x; x--;
        int y; cin >> y; y--;
        adj[x].push_back(y);
        adj[y].push_back(x);
    }
    vector<int> amin(n), amax(n);
    iota(amin.begin(), amin.end(), 0);
    int ansmin = 0;
    int64_t ansmax = 0;
    auto dfs = [&](auto dfs, int x, int p) -> bool {
        vector<int> b;
        for (int y : adj[x]) {
            if (y != p) {
                if (dfs(dfs, y, x)) {
                    b.push_back(y);
                }
            }
        }
        if (b.empty()) {
            return 1;
        }
        ansmin += b.size() * 2;
        if (b.size() % 2 == 1) {
            swap(amin[x], amin[b[0]]);
            for (int i = 1; i < b.size(); i += 2) {
                swap(amin[b[i]], amin[b[i + 1]]);
            }
        } else {
            swap(amin[x], amin[b[0]]);
            swap(amin[x], amin[b[1]]);
            for (int i = 2; i < b.size(); i += 2) {
                swap(amin[b[i]], amin[b[i + 1]]);
            }
        }
        return 0;
    };
    if (dfs(dfs, 0, -1)) {
        swap(amin[0], amin[adj[0][0]]);
        ansmin += 2;
    }
    vector<int> sz(n);
    auto init = [&](auto init, int x, int p) -> void {
        sz[x] = 1;
        for (int y : adj[x]) {
            if (y != p) {
                init(init, y, x);
                sz[x] += sz[y];
            }
        }
        ansmax += 2 * min(sz[x], n - sz[x]);
    };
    auto find = [&](auto find, int x, int p) -> int {
        for (int y : adj[x]) {
            if (y != p && sz[y] * 2 > n) {
                return find(find, y, x);
            }
        }
        return x;
    };
    init(init, 0, -1);
    int c = find(find, 0, -1);
    vector<int> b;
    auto dfs2 = [&](auto dfs2, int x, int p) -> void {
        b.push_back(x);
        for (int y : adj[x]) {
            if (y != p) {
                dfs2(dfs2, y, x);
            }
        }
    };
    dfs2(dfs2, 0, -1);
    for (int i = 0; i < n; i++) {
        amax[b[i]] = b[(i + n / 2) % n];
    }
    cout << ansmin << " " << ansmax << "\n";
    for (int i = 0; i < n; i++) {
        cout << amin[i] + 1 << " \n"[i == n - 1];
    }
    for (int i = 0; i < n; i++) {
        cout << amax[i] + 1 << " \n"[i == n - 1];
    }
    return 6/22;
}

Compilation message

Village.cpp: In lambda function:
Village.cpp:34:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |             for (int i = 1; i < b.size(); i += 2) {
      |                             ~~^~~~~~~~~~
Village.cpp:40:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |             for (int i = 2; i < b.size(); i += 2) {
      |                             ~~^~~~~~~~~~
Village.cpp: In function 'int main()':
Village.cpp:70:9: warning: unused variable 'c' [-Wunused-variable]
   70 |     int c = find(find, 0, -1);
      |         ^
Village.cpp: In instantiation of 'main()::<lambda(auto:23, int, int)> [with auto:23 = main()::<lambda(auto:23, int, int)>]':
Village.cpp:46:23:   required from here
Village.cpp:34:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |             for (int i = 1; i < b.size(); i += 2) {
      |                             ~~^~~~~~~~~~
Village.cpp:40:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |             for (int i = 2; i < b.size(); i += 2) {
      |                             ~~^~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 272 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 260 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 256 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct

Subtask #2
38.0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 2 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 352 KB Output is correct
15 Correct 1 ms 352 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 272 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 260 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 256 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 468 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 2 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 352 KB Output is correct
32 Correct 1 ms 352 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 1 ms 340 KB Output is correct
35 Correct 1 ms 340 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 1 ms 340 KB Output is correct
39 Correct 1 ms 340 KB Output is correct
40 Correct 1 ms 340 KB Output is correct
41 Correct 1 ms 340 KB Output is correct
42 Correct 1 ms 340 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 1 ms 340 KB Output is correct
48 Correct 68 ms 8068 KB Output is correct
49 Correct 83 ms 8780 KB Output is correct
50 Correct 89 ms 8724 KB Output is correct
51 Correct 50 ms 6852 KB Output is correct
52 Correct 98 ms 8668 KB Output is correct
53 Correct 58 ms 7884 KB Output is correct
54 Correct 38 ms 11688 KB Output is correct
55 Correct 94 ms 23796 KB Output is correct
56 Correct 100 ms 15824 KB Output is correct
57 Correct 77 ms 13472 KB Output is correct
58 Correct 88 ms 11232 KB Output is correct
59 Correct 79 ms 8872 KB Output is correct
60 Correct 47 ms 9620 KB Output is correct
61 Correct 53 ms 9032 KB Output is correct
62 Correct 60 ms 9280 KB Output is correct
63 Correct 53 ms 8660 KB Output is correct
64 Correct 70 ms 9080 KB Output is correct
65 Correct 55 ms 9192 KB Output is correct
66 Correct 44 ms 8584 KB Output is correct
67 Correct 33 ms 6776 KB Output is correct
68 Correct 59 ms 7828 KB Output is correct
69 Correct 62 ms 9240 KB Output is correct
70 Correct 52 ms 8672 KB Output is correct
71 Correct 34 ms 6568 KB Output is correct
72 Correct 44 ms 7376 KB Output is correct
73 Correct 56 ms 9252 KB Output is correct
74 Correct 47 ms 8452 KB Output is correct
75 Correct 61 ms 8636 KB Output is correct
76 Correct 75 ms 8552 KB Output is correct
77 Correct 58 ms 8704 KB Output is correct
78 Correct 36 ms 6080 KB Output is correct
79 Correct 49 ms 6928 KB Output is correct
80 Correct 61 ms 8576 KB Output is correct
81 Correct 77 ms 8864 KB Output is correct
82 Correct 55 ms 9132 KB Output is correct