結果
問題 | No.845 最長の切符 |
ユーザー | peroon |
提出日時 | 2019-12-07 08:24:12 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 6,079 bytes |
コンパイル時間 | 2,064 ms |
コンパイル使用メモリ | 188,332 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-06-06 20:01:04 |
合計ジャッジ時間 | 3,239 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
(要ログイン)
テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | WA | - |
testcase_08 | AC | 2 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 2 ms
5,376 KB |
testcase_11 | AC | 2 ms
5,376 KB |
testcase_12 | WA | - |
testcase_13 | AC | 2 ms
5,376 KB |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | AC | 3 ms
5,376 KB |
testcase_18 | AC | 2 ms
5,376 KB |
testcase_19 | WA | - |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | WA | - |
testcase_25 | AC | 2 ms
5,376 KB |
testcase_26 | AC | 2 ms
5,376 KB |
testcase_27 | AC | 2 ms
5,376 KB |
testcase_28 | AC | 2 ms
5,376 KB |
testcase_29 | AC | 2 ms
5,376 KB |
ソースコード
#include<bits/stdc++.h> using namespace std; using ll = long long; using VI = vector<ll>; using VV = vector<VI>; using VS = vector<string>; using PII = pair<ll, ll>; // tourist set template <typename A, typename B> string to_string(pair<A, B> p); template <typename A, typename B, typename C> string to_string(tuple<A, B, C> p); template <typename A, typename B, typename C, typename D> string to_string(tuple<A, B, C, D> p); string to_string(const string& s) { return '"' + s + '"'; } string to_string(const char* s) { return to_string((string) s); } string to_string(bool b) { return (b ? "true" : "false"); } string to_string(vector<bool> v) { bool first = true; string res = "{"; for (int i = 0; i < static_cast<int>(v.size()); i++) { if (!first) { res += ", "; } first = false; res += to_string(v[i]); } res += "}"; return res; } template <size_t N> string to_string(bitset<N> v) { string res = ""; for (size_t i = 0; i < N; i++) { res += static_cast<char>('0' + v[i]); } return res; } template <typename A> string to_string(A v) { bool first = true; string res = "{"; for (const auto &x : v) { if (!first) { res += ", "; } first = false; res += to_string(x); } res += "}"; return res; } template <typename A, typename B> string to_string(pair<A, B> p) { return "(" + to_string(p.first) + ", " + to_string(p.second) + ")"; } template <typename A, typename B, typename C> string to_string(tuple<A, B, C> p) { return "(" + to_string(get<0>(p)) + ", " + to_string(get<1>(p)) + ", " + to_string(get<2>(p)) + ")"; } template <typename A, typename B, typename C, typename D> string to_string(tuple<A, B, C, D> p) { return "(" + to_string(get<0>(p)) + ", " + to_string(get<1>(p)) + ", " + to_string(get<2>(p)) + ", " + to_string(get<3>(p)) + ")"; } void debug_out() { cerr << '\n'; } template <typename Head, typename... Tail> void debug_out(Head H, Tail... T) { cerr << " " << to_string(H); debug_out(T...); } #ifdef LOCAL #define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__) #else #define debug(...) 42 #endif // tourist set end template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; } template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; } #define FOR(i,a,b) for(ll i=(a);i<(b);++i) #define rep(i,b) FOR(i, 0, b) #define ALL(v) (v).begin(), (v).end() #define p(s) cout<<(s)<<'\n' #define p2(s, t) cout << (s) << " " << (t) << '\n' #define br() p("") #define pn(s) cout << (#s) << " " << (s) << '\n' #define p_yes() p("YES") #define p_no() p("NO") #define SZ(x) ((int)(x).size()) #define SORT(A) sort(ALL(A)) #define RSORT(A) sort(ALL(A), greater<ll>()) #define MP make_pair void no(){p_no(); exit(0);} void yes(){p_yes(); exit(0);} const ll mod = 1e9 + 7; const ll inf = 1e18; const double PI = acos(-1); struct Edge{ ll to; ll cost; Edge(ll to, ll cost): to(to), cost(cost) {} Edge(){ to = 0; cost = 0; } }; struct Node{ ll distance; ll index; Node(ll d, ll i){ distance = d; index = i; } Node(){} bool operator<(const Node &another) const { return distance < another.distance; } bool operator>(const Node &another) const { return distance > another.distance; } }; struct Dijkstra{ vector<ll> d; vector<vector<Edge> > graph; vector<bool> done; // ノード数を入れる void initialize(ll size){ d.resize(size); done.resize(size); graph.resize(size); reset(); } void reset(){ ll N = graph.size(); FOR(i, 0, N){ d[i] = inf; done[i] = false; } } ll distance(int i){ if((ll)d.size()<=i) return -1; return d[i]; } void print_graph(){ FOR(i, 0, (ll)graph.size()){ cout << i << " -> "; for(auto edge : graph[i]){ cout << edge.to << " "; } cout << endl; } p("distance"); FOR(i, 0, (ll)graph.size()){ ll d = distance(i); cout << i << " " << d << endl; } } void register_edge(ll a, ll b, ll cost){ auto edge = Edge(b, cost); graph[a].push_back(edge); } // 双方向 void register_edge2(ll a, ll b, ll cost){ register_edge(a, b, cost); register_edge(b, a, cost); } void calc_shortest_path(ll from=0){ ll N = graph.size(); if(from<0 || from>=N){ cout << "index error" << endl; exit(0); } priority_queue<Node, vector<Node>, greater<Node> > que; auto node = Node(); // 始点 node.index = from; node.distance = 0; que.push(node); while(!que.empty()){ // 1番distanceが小さいノード Node n = que.top(); que.pop(); if(done[n.index]){ continue; } done[n.index] = true; d[n.index] = n.distance; auto edge_list = graph[n.index]; for(auto edge : edge_list){ // 短くなるノードがあれば if(!done[edge.to] && n.distance + edge.cost < d[edge.to]){ ll shorter_distance = n.distance + edge.cost; que.push(Node(shorter_distance, edge.to)); } } } } }; int main(){ cin.tie(0); ios::sync_with_stdio(false); // input ll N, M; cin >> N >> M; VI A(M); VI B(M); VI C(M); rep(i, M){ cin >> A[i] >> B[i] >> C[i]; A[i]--; B[i]--; } ll ma = 0; rep(i, N){ Dijkstra dij; dij.initialize(N); rep(i, M){ dij.register_edge2(A[i], B[i], -C[i]); } dij.calc_shortest_path(i); rep(j, N){ ll d = dij.distance(j); chmax(ma, -d); } } p(ma); return 0; }