Submission #395376

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
395376	2021-04-28 09:51:24	KoD	Village (BOI20_village)	C++17	75 / 100	170 ms	22720 KiB

Village

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#include <bits/stdc++.h>
template <class T>
using Vec = std::vector<T>;
int main() {
    int N;
    std::cin >> N;
    Vec<Vec<int>> graph(N);
    for (int i = 0; i < N - 1; ++i) {
        int a, b;
        std::cin >> a >> b;
        a -= 1;
        b -= 1;
        graph[a].push_back(b);
        graph[b].push_back(a);
    }
    int min = -1, max = -1;
    Vec<int> min_v(N), max_v(N);
    // minimum
    {
        Vec<std::pair<int, int>> use;
        auto dfs = [&](auto&& dfs, const int u, const int p) -> bool {
            int child = -1;
            bool done = false;
            for (const int v: graph[u]) {
                if (v != p) {
                    if (dfs(dfs, v, u)) {
                        done = true;
                    }
 
 
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Compilation message (stderr)

Village.cpp: In function 'int main()':
Village.cpp:118:32: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  118 |                     (up.size() < N / 2 ? up : down).push_back(u);
      |                      ~~~~~~~~~~^~~~~~~
Village.cpp:130:32: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  130 |                     (up.size() < (N - 1) / 2 ? up : down).push_back(u);
      |                      ~~~~~~~~~~^~~~~~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 38 / 38
• Subtask 3: 25 / 50