제출 #480250

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
480250		erray	Meetings 2 (JOI21_meetings2)	C++17	0 / 100	1 ms	204 KiB

meetings2

// author: erray
#include <bits/stdc++.h>
 
using namespace std;

template<typename A, typename B> string to_string(const pair<A, B>& p);
template<typename A, typename B, typename C> string to_string(const tuple<A, B, C>& t);
template<typename A, typename B, typename C, typename D> string to_string(const tuple<A, B, C, D>& t);

string to_string(const string& s) {
  return '"' + s + '"';
}

string to_string(const char& c) {
  return string("'") + c + "'";
}

string to_string(const char *c) {
  return to_string(string(c));
}

string to_string(const bool& b) {
  return (b ? "true" : "false");
}

string to_string(const vector<bool>& v) {
  string res = "{";
  for (int i = 0; i < (int) v.size(); ++i) {
    if (i > 0) {
      res += ", ";
    }
    res += to_string(v[i]);
  }
  res += "}";
  return res;
}

template<size_t T> string to_string(const bitset<T>& bs) {
  return bs.to_string();
}

template<typename T> string to_string(queue<T> q) {
  string res = "{";
  size_t sz = q.size();
  while (sz--) {
    T cur = q.front();
    q.pop();
    if ((int) res.size() > 1) {
      res += ", ";
    }
    res += to_string(cur);
  }
  res += "}";
  return res;
}

template<typename T, class C> string to_string(priority_queue<T, vector<T>, C> pq) {
  string res = "{";
  while (!pq.empty()) {
    T cur = pq.top();
    pq.pop();
    if ((int) res.size() > 1) {
      res += ", ";
    }
    res += to_string(cur);
  }
  res += "}";
  return res;
}

template<typename T> string to_string(const T& v) {
  string res = "{";
  for (auto &el : v) {
    if ((int) res.size() > 1) {
      res += ", ";
    }
    res += to_string(el);
  }
  res += "}";
  return res;
}

template<typename A, typename B> string to_string(const pair<A, B>& p) {
  return '(' + to_string(p.first) + ", " + to_string(p.second) + ')';
}
template<typename A, typename B, typename C> string to_string(const tuple<A, B, C>& t) {
  return '(' + to_string(get<0>(t)) + ", " + to_string(get<1>(t)) + ", " + to_string(get<2>(t)) + ')';
}
template<typename A, typename B, typename C, typename D> string to_string(const tuple<A, B, C, D>& t) {
  return '(' + to_string(get<0>(t)) + ", " + to_string(get<1>(t)) + ", " + to_string(get<2>(t)) + ", " + to_string(get<3>(t)) + ')';
}

void debug_out(int size, bool first, string name) {
  vector<string> tmp = {name};
  vector<int> tmp2 = {size, first};
  cerr << endl;
}

constexpr int buffer_size = 255;

template<typename Head, typename... Tail> void debug_out(int size, bool first, string name, Head H, Tail... T) {
  string tmp;
  int off = 0;
  while ((!name.empty() && name[0] != ',') || off != 0) {
    tmp += name[0];
    name.erase(name.begin());
    char c = tmp.back();
    if (c == '{' || c == '(') {
      ++off;
    } else if (c == '}' || c == ')'){
      --off;
    }
  }
  if (!name.empty()) {
    name.erase(name.begin());
  }
  if (tmp[0] == ' ') {
    tmp.erase(tmp.begin());
  }

  string buff = to_string(H);
  if ((int) buff.size() + size + (int) tmp.size() > buffer_size - 5 && !first) {
    cerr << '\n';
    size = 0;
  }
  cerr << '[' << tmp << ": " << buff << "] ";
  debug_out(((int) buff.size() + size + (int) tmp.size() + 5) % buffer_size, false, name, T...);
}

#ifdef DEBUG
#define debug(...) cerr << "-> ", debug_out(3, true, string(#__VA_ARGS__), __VA_ARGS__)
#define here cerr << "-> " << __LINE__ << endl
#else
#define debug(...) void(37)
#define here void(37)
#endif

struct Fenwick {
  const int def = 0;
  vector<int> a;
  int n;
  Fenwick(int _n) : n(_n) {
    a.resize(n + 1, def);
  }

  int get(int x) {
    x = n - x;
    int res = def;
    while (x > 0) {
      res = max(res, a[x]);
      x -= x & -x;
    }
    return res;
  }

  void modify(int x, int c) {
    x = n - x;
    while (x <= n) {
      a[x] = max(a[x], c);
      x += x & -x;
    } 
  }
};

string to_string(Fenwick x) {
  string res;
  for (int i = 0; i < x.n; ++i) {
    if (i > 0) {
      res += ", ";
    }
    res += to_string(x.get(i));
  }
  return res;
}
 
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  int n;
  cin >> n;
  vector<vector<int>> g(n);
  for (int i = 0; i < n - 1; ++i) {
    int x, y;
    cin >> x >> y;
    --x, --y;
    g[x].push_back(y);
    g[y].push_back(x);
  }

  vector<int> size(n, 1);
  function<void(int, int)> Pre = [&](int v, int pr) {
    for (auto u : g[v]) {
      if (u != pr) {
        Pre(u, v);
        size[v] += size[u];
      }
    }
  };
  Pre(0, -1);
  debug(size);

  int root = -1;
  int next = 0;
  while (next != -1) {
    root = next;
    next = -1;
    for (auto u : g[root]) {
      if (size[u] * 2 > n) {
        next = u;
        size[root] -= size[next];
        size[next] += size[root];
      }
    }
  }

  debug(root, size);
  
  debug(g);
  vector<array<int, 2>> ct(n, {-1, -1});
  vector<int> ans(n + 1, -1);
  vector<int> d(n);
  vector<Fenwick*> dp(n);
  function<void(int)> Dfs = [&](int v) {
    for (int i = 0; i < int(g[v].size()); ++i) {
      int u = g[v][i];
      g[u].erase(find(g[u].begin(), g[u].end(), v));
      d[u] = d[v] + 1;
      Dfs(u);     
      if (size[u] > size[g[v][0]]) {
        swap(g[v][0], g[v][i]);
      }
    }

    debug(v);
    debug(g[v]);
    if (g[v].empty()) {
      dp[v] = new Fenwick(n + 2);
    } else {
      dp[v] = dp[g[v][0]];
    }
    
    for (int i = 1; i < int(g[v].size()); ++i) {
      int u = g[v][i];
      vector<int> que;
      que.push_back(u);
      for (int j = 0; j < int(que.size()); ++j) {
        int x = que[j];
        for (auto nu : g[x]) {
          que.push_back(nu);
        }
      }
      debug(que);
      debug(*dp[v]);
      for (auto e : que) {
        ans[size[e]] = max(ans[size[e]], dp[v]->get(size[e]) + d[e] - 2 * d[v] + 1);
      }
      for (auto e : que) {
        dp[v]->modify(size[e], d[e]);  
      }
    }
    dp[v]->modify(size[v], d[v]);
    ans[size[v]] = max(ans[size[v]], d[v] + 1);
    debug(v, *dp[v], size[v], d[v]);
    debug(ans);
  };
  Dfs(root);  
  debug(d);

  for (int i = n; i > 0; --i) {
    ans[i - 1] = max(ans[i - 1], ans[i]);
  }

  for (int i = 1; i <= n; ++i) {
    cout << (i % 2 ? 1 : ans[i / 2]) << '\n';
  }
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 16
• Subtask 3: 0 / 80