結果

問題 No.812 Change of Class
ユーザー Tiramister
提出日時 2019-04-12 23:14:35
言語 C++14
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 398 ms / 4,000 ms
コード長 2,889 bytes
コンパイル時間 1,036 ms
コンパイル使用メモリ 89,660 KB
実行使用メモリ 12,172 KB
最終ジャッジ日時 2024-06-12 19:54:49
合計ジャッジ時間 10,738 ms
ジャッジサーバーID
(参考情報)
judge5 / judge4
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 60
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include <iostream>
#include <numeric>
#include <vector>
#include <queue>
#include <tuple>
#include <limits>
template <class Cost = int>
struct Edge {
int from, to;
Cost cost;
Edge(int from = -1, int to = -1, Cost cost = 1)
: from(from), to(to), cost(cost){};
bool operator<(const Edge<Cost>& e) const { return this->cost < e.cost; }
bool operator>(const Edge<Cost>& e) const { return this->cost > e.cost; }
};
template <class Cost = int>
class Graph {
public:
int size;
std::vector<std::vector<Edge<Cost>>> path;
explicit Graph(int N = 0) : size(N), path(size) {}
void span(int from, int to, Cost cost = 1) {
path[from].push_back(Edge<Cost>(from, to, cost));
}
std::vector<Edge<Cost>>& operator[](int v) { return path[v]; }
};
const int INF = std::numeric_limits<int>::max() / 3;
class UnionFind {
private:
std::vector<int> par, num;
int find(int v) {
return (par[v] == v) ? v : (par[v] = find(par[v]));
}
public:
explicit UnionFind(int N) : par(N), num(N, 1) {
std::iota(par.begin(), par.end(), 0);
}
void unite(int u, int v) {
u = find(u), v = find(v);
if (u == v) return;
if (num[u] < num[v]) std::swap(u, v);
num[u] += num[v];
par[v] = u;
}
bool same(int u, int v) { return find(u) == find(v); }
bool ispar(int v) { return v == find(v); }
int size(int v) { return num[find(v)]; }
};
template <class Cost>
std::vector<Cost> dijkstra(Graph<Cost>& graph, std::vector<int> ss) {
std::vector<Cost> dist(graph.size, INF);
std::priority_queue<std::pair<int, Cost>, std::vector<std::pair<int, Cost>>, std::greater<std::pair<int, Cost>>> que;
for (auto s : ss) {
dist[s] = 0;
que.emplace(0, s);
}
while (!que.empty()) {
int v;
Cost d;
std::tie(d, v) = que.top();
que.pop();
if (d > dist[v]) continue;
for (auto e : graph[v]) {
if (dist[e.to] <= dist[v] + e.cost) continue;
dist[e.to] = dist[v] + e.cost;
que.emplace(dist[e.to], e.to);
}
}
return dist;
}
int main() {
int N, M;
std::cin >> N >> M;
Graph<> graph(N);
UnionFind uf(N);
for (int i = 0; i < M; ++i) {
int p, q;
std::cin >> p >> q;
--p, --q;
graph.span(p, q);
graph.span(q, p);
uf.unite(p, q);
}
int Q;
std::cin >> Q;
for (int q = 0; q < Q; ++q) {
int a;
std::cin >> a;
--a;
std::cout << uf.size(a) - 1 << " ";
auto dist = dijkstra<>(graph, {a});
int max = 1;
for (auto d : dist) {
if (0 < d && d < INF) max = std::max(max, d);
}
int day;
for (day = 0; (1 << day) < max; ++day) {}
std::cout << day << std::endl;
}
return 0;
}
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