結果

問題 No.2565 はじめてのおつかい
ユーザー ei1333333
提出日時 2023-12-02 15:35:01
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 177 ms / 2,000 ms
コード長 4,949 bytes
コンパイル時間 4,370 ms
コンパイル使用メモリ 259,856 KB
最終ジャッジ日時 2025-02-18 04:44:32
ジャッジサーバーID
(参考情報)
judge3 / judge2
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 3
other AC * 50
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<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using int64 = long long;
constexpr int mod = 998244353;
constexpr int64 infll = (1LL << 62) - 1;
constexpr int inf = (1 << 30) - 1;
struct IoSetup {
IoSetup() {
cin.tie(nullptr);
ios::sync_with_stdio(false);
cout << fixed << setprecision(10);
cerr << fixed << setprecision(10);
}
} iosetup;
template<typename T1, typename T2>
ostream &operator<<(ostream &os, const pair<T1, T2> &p) {
os << p.first << " " << p.second;
return os;
}
template<typename T1, typename T2>
istream &operator>>(istream &is, pair<T1, T2> &p) {
is >> p.first >> p.second;
return is;
}
template<typename T>
ostream &operator<<(ostream &os, const vector<T> &v) {
for (int i = 0; i < (int) v.size(); i++) {
os << v[i] << (i + 1 != v.size() ? " " : "");
}
return os;
}
template<typename T>
istream &operator>>(istream &is, vector<T> &v) {
for (T &in : v) is >> in;
return is;
}
template<typename T1, typename T2>
inline bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }
template<typename T1, typename T2>
inline bool chmin(T1 &a, T2 b) { return a > b && (a = b, true); }
template<typename T = int64>
vector<T> make_v(size_t a) {
return vector<T>(a);
}
template<typename T, typename... Ts>
auto make_v(size_t a, Ts... ts) {
return vector<decltype(make_v<T>(ts...))>(a, make_v<T>(ts...));
}
template<typename T, typename V>
typename enable_if<is_class<T>::value == 0>::type fill_v(T &t, const V &v) {
t = v;
}
template<typename T, typename V>
typename enable_if<is_class<T>::value != 0>::type fill_v(T &t, const V &v) {
for (auto &e : t) fill_v(e, v);
}
template<typename F>
struct FixPoint : F {
explicit FixPoint(F &&f) : F(forward<F>(f)) {}
template<typename... Args>
decltype(auto) operator()(Args &&... args) const {
return F::operator()(*this, forward<Args>(args)...);
}
};
template<typename F>
inline decltype(auto) MFP(F &&f) {
return FixPoint<F>{forward<F>(f)};
}
#line 2 "graph/shortest-path/bfs.hpp"
#line 2 "graph/graph-template.hpp"
/**
* @brief Graph Template()
*/
template< typename T = int >
struct Edge {
int from, to;
T cost;
int idx;
Edge() = default;
Edge(int from, int to, T cost = 1, int idx = -1) : from(from), to(to), cost(cost), idx(idx) {}
operator int() const { return to; }
};
template< typename T = int >
struct Graph {
vector< vector< Edge< T > > > g;
int es;
Graph() = default;
explicit Graph(int n) : g(n), es(0) {}
size_t size() const {
return g.size();
}
void add_directed_edge(int from, int to, T cost = 1) {
g[from].emplace_back(from, to, cost, es++);
}
void add_edge(int from, int to, T cost = 1) {
g[from].emplace_back(from, to, cost, es);
g[to].emplace_back(to, from, cost, es++);
}
void read(int M, int padding = -1, bool weighted = false, bool directed = false) {
for(int i = 0; i < M; i++) {
int a, b;
cin >> a >> b;
a += padding;
b += padding;
T c = T(1);
if(weighted) cin >> c;
if(directed) add_directed_edge(a, b, c);
else add_edge(a, b, c);
}
}
inline vector< Edge< T > > &operator[](const int &k) {
return g[k];
}
inline const vector< Edge< T > > &operator[](const int &k) const {
return g[k];
}
};
template< typename T = int >
using Edges = vector< Edge< T > >;
#line 4 "graph/shortest-path/bfs.hpp"
/**
* @brief BFS()
*/
template< typename T >
vector< T > bfs(const Graph< T > &g, int s) {
T max_cost = 0, beet = 0;
for(auto &es : g.g) {
for(auto &e : es) max_cost = max(max_cost, e.cost);
}
++max_cost;
const auto INF = numeric_limits< T >::max();
vector< T > dist(g.size(), INF);
vector< queue< int > > ques(max_cost + 1);
dist[s] = 0;
ques[0].emplace(s);
for(T cost = 0; cost <= beet; cost++) {
auto &que = ques[cost % max_cost];
while(!que.empty()) {
int idx = que.front();
que.pop();
if(dist[idx] < cost) continue;
for(auto &e : g[idx]) {
auto next_cost = cost + e.cost;
if(dist[e.to] <= next_cost) continue;;
dist[e.to] = next_cost;
beet = max(beet, dist[e.to]);
ques[dist[e.to] % max_cost].emplace(e.to);
}
}
}
return dist;
}
int main() {
int N, M;
cin >> N >> M;
Graph<> g(N + N + N + N);
for(int i = 0; i < M; i++) {
int u, v;
cin >> u >> v;
--u, --v;
g.add_directed_edge(u, v);
g.add_directed_edge(u + N, v + N);
g.add_directed_edge(u + N + N, v + N + N);
g.add_directed_edge(u + N + N + N, v + N + N + N);
}
g.add_directed_edge(N - 1, N - 1 + N, 0);
g.add_directed_edge(N - 2, N - 2 + N + N, 0);
g.add_directed_edge(N - 2 + N, N - 2 + N + N + N, 0);
g.add_directed_edge(N - 1 + N + N, N - 1 + N + N + N, 0);
auto s = bfs(g, 0);
auto ret = s[N + N + N];
if(ret >= inf) cout << -1 << endl;
else cout << ret << endl;
}
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0