結果
問題 | No.1928 Make a Binary Tree |
ユーザー |
|
提出日時 | 2022-05-06 22:00:16 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 280 ms / 3,000 ms |
コード長 | 4,366 bytes |
コンパイル時間 | 2,886 ms |
コンパイル使用メモリ | 204,428 KB |
最終ジャッジ日時 | 2025-01-29 03:27:12 |
ジャッジサーバーID (参考情報) |
judge4 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 57 |
ソースコード
#include <bits/stdc++.h>using namespace std;#define rep(i, n) for (int i = 0; i < n; i++)#define rep2(i, x, n) for (int i = x; i <= n; i++)#define rep3(i, x, n) for (int i = x; i >= n; i--)#define each(e, v) for (auto &e : v)#define pb push_back#define eb emplace_back#define all(x) x.begin(), x.end()#define rall(x) x.rbegin(), x.rend()#define sz(x) (int)x.size()using ll = long long;using pii = pair<int, int>;using pil = pair<int, ll>;using pli = pair<ll, int>;using pll = pair<ll, ll>;template <typename T>bool chmax(T &x, const T &y) {return (x < y) ? (x = y, true) : false;}template <typename T>bool chmin(T &x, const T &y) {return (x > y) ? (x = y, true) : false;}template <typename T>int flg(T x, int i) {return (x >> i) & 1;}template <typename T>void print(const vector<T> &v, T x = 0) {int n = v.size();for (int i = 0; i < n; i++) cout << v[i] + x << (i == n - 1 ? '\n' : ' ');if (v.empty()) cout << '\n';}template <typename T>void printn(const vector<T> &v, T x = 0) {int n = v.size();for (int i = 0; i < n; i++) cout << v[i] + x << '\n';}template <typename T>int lb(const vector<T> &v, T x) {return lower_bound(begin(v), end(v), x) - begin(v);}template <typename T>int ub(const vector<T> &v, T x) {return upper_bound(begin(v), end(v), x) - begin(v);}template <typename T>void rearrange(vector<T> &v) {sort(begin(v), end(v));v.erase(unique(begin(v), end(v)), end(v));}template <typename T>vector<int> id_sort(const vector<T> &v, bool greater = false) {int n = v.size();vector<int> ret(n);iota(begin(ret), end(ret), 0);sort(begin(ret), end(ret), [&](int i, int j) { return greater ? v[i] > v[j] : v[i] < v[j]; });return ret;}template <typename S, typename T>pair<S, T> operator+(const pair<S, T> &p, const pair<S, T> &q) {return make_pair(p.first + q.first, p.second + q.second);}template <typename S, typename T>pair<S, T> operator-(const pair<S, T> &p, const pair<S, T> &q) {return make_pair(p.first - q.first, p.second - q.second);}template <typename S, typename T>istream &operator>>(istream &is, pair<S, T> &p) {S a;T b;is >> a >> b;p = make_pair(a, b);return is;}template <typename S, typename T>ostream &operator<<(ostream &os, const pair<S, T> &p) {return os << p.first << ' ' << p.second;}struct io_setup {io_setup() {ios_base::sync_with_stdio(false);cin.tie(NULL);cout << fixed << setprecision(15);}} io_setup;const int inf = (1 << 30) - 1;const ll INF = (1LL << 60) - 1;const int MOD = 1000000007;// const int MOD = 998244353;template <bool directed = false>struct Graph {struct edge {int to, id;edge(int to, int id) : to(to), id(id) {}};vector<vector<edge>> es;const int n;int m;vector<int> dp;vector<priority_queue<int>> que;Graph(int n) : es(n), n(n), m(0), dp(n, 1), que(n) {}void add_edge(int from, int to) {es[from].emplace_back(to, m);if (!directed) es[to].emplace_back(from, m);m++;}void dfs(int now, int pre = -1) {vector<int> ids;int si = -1, id = -1;each(e, es[now]) {if (e.to == pre) continue;dfs(e.to, now);if (chmax(si, sz(que[e.to]))) id = e.to;ids.eb(e.to);}// sort(all(ids), [&](int i, int j) { return dp[i] > dp[j]; });// rep(i, min(2, sz(ids))) dp[now] += dp[ids[i]];if (id != -1) swap(que[now], que[id]);each(e, es[now]) {if (e.to == pre) continue;if (e.to != id) {while (!empty(que[e.to])) {que[now].emplace(que[e.to].top());que[e.to].pop();}}que[now].emplace(dp[e.to]);}int r = 2;while (!empty(que[now]) && r > 0) {dp[now] += que[now].top();que[now].pop();r--;}}void solve() {dfs(0);// print(dp);cout << dp[0] << '\n';}};int main() {int N;cin >> N;Graph G(N);rep(i, N - 1) {int u, v;cin >> u >> v;u--, v--;G.add_edge(u, v);}G.solve();}