結果
問題 | No.2072 Anatomy |
ユーザー |
|
提出日時 | 2024-11-27 15:51:33 |
言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,667 bytes |
コンパイル時間 | 5,149 ms |
コンパイル使用メモリ | 325,052 KB |
実行使用メモリ | 45,144 KB |
最終ジャッジ日時 | 2024-11-27 15:51:44 |
合計ジャッジ時間 | 9,737 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 20 WA * 7 |
ソースコード
#include<bits/stdc++.h>#include<atcoder/all>using namespace std;namespace my{#define eb emplace_back#define LL(...) ll __VA_ARGS__;lin(__VA_ARGS__)#define FO(n) for(ll ij=n;ij--;)#define FOR(i,...) for(auto[i,i##stop,i##step]=range(0,__VA_ARGS__);i<i##stop;i+=i##step)#define fo(i,...) FO##__VA_OPT__(R)(i __VA_OPT__(,__VA_ARGS__))#define fe(a,i,...) for(auto&&__VA_OPT__([)i __VA_OPT__(,__VA_ARGS__]):a)#define single_testcase void solve();}int main(){my::io();my::solve();}namespace my{void io(){cin.tie(nullptr)->sync_with_stdio(0);cout<<fixed<<setprecision(15);}using ll=long long;template<class...A>constexpr auto range(bool s,A...a){array<ll,3>r{0,0,1};ll I=0;((r[I++]=a),...);if(!s&&I==1)swap(r[0],r[1]);r[0]-=s;return r;}constexpr char nl=10;constexpr char sp=32;bool amax(auto&a,const auto&b){return a<b?a=b,1:0;}auto max(const auto&...a){return max(initializer_list<common_type_t<decltype(a)...>>{a...});}template<class A,class B>struct pair{A a;B b;pair()=default;pair(A a,B b):a(a),b(b){}pair(const std::pair<A,B>&p):a(p.first),b(p.second){}auto operator<=>(const pair&)const=default;friend ostream&operator<<(ostream&o,const pair&p){return o<<p.a<<sp<<p.b;}};template<class F=less<>>auto&sort(auto&a,const F&f={}){ranges::sort(a,f);return a;}template<class T,class U>ostream&operator<<(ostream&o,const std::pair<T,U>&p){return o<<p.first<<sp<<p.second;}template<class V>concept vectorial=is_base_of_v<vector<typename V::value_type>,V>;template<class T>struct vec_attr{using core_type=T;static constexpr int d=0;};template<vectorial V>struct vec_attr<V>{using core_type=typename vec_attr<typename V::value_type>::core_type;static constexpr int d=vec_attr<typenameV::value_type>::d+1;};template<class T>using core_t=vec_attr<T>::core_type;template<class V>istream&operator>>(istream&i,vector<V>&v){fe(v,e)i>>e;return i;}template<class V>ostream&operator<<(ostream&o,const vector<V>&v){fe(v,e)o<<e<<string(&e!=&v.back(),vectorial<V>?nl:sp);return o;}template<class V>struct vec:vector<V>{using vector<V>::vector;vec(const vector<V>&v){vector<V>::operator=(v);}vec&operator^=(const vec&u){this->insert(this->end(),u.begin(),u.end());return*this;}vec operator^(const vec&u)const{return vec{*this}^=u;}vec&operator++(){fe(*this,e)++e;return*this;}vec&operator--(){fe(*this,e)--e;return*this;}vec operator-()const{vec v=*this;fe(v,e)e=-e;return v;}auto scan(const auto&f)const{pair<core_t<V>,bool>r{};fe(*this,e)if constexpr(!vectorial<V>)r.b?f(r.a,e),r:r={e,1};else if(auto s=e.scan(f);s.b)r.b?f(r.a,s.a),r:r=s;return r;}auto max()const{return scan([](auto&a,const auto&b){a<b?a=b:0;}).a;}};void lin(auto&...a){(cin>>...>>a);}template<char c=sp>void pp(const auto&...a){ll n=sizeof...(a);((cout<<a<<string(--n>0,c)),...);cout<<nl;}void dec(auto&...a){((--a),...);}struct dsu{ll n;vec<ll>d;dsu(ll n):n(n),d(n,-1){}ll leader(ll a){assert(0<=a&&a<n);if(d[a]<0)return a;return d[a]=leader(d[a]);}ll size(ll a){return-d[leader(a)];}ll merge(ll a,ll b){ll x=leader(a),y=leader(b);if(x==y)return x;if(-d[x]<-d[y])swap(x,y);d[x]+=d[y],d[y]=x;return x;}};template<class WT>struct edge{ll from,to;WT wt;ll id;edge()=default;edge(ll from,ll to,WT wt=1,ll id=-1):from(from),to(to),wt(wt),id(id){}auto operator<=>(const edge&e)const{return wt<=>e.wt;}friend ostream&operator<<(ostream&o,const edge&e){return o<<"(to "<<e.to<<", wt "<<e.wt<<")";}};template<class WT>struct graph{vec<vec<edge<WT>>>edges;graph()=default;graph(ll n):edges(n){}decltype(auto)operator[](ll i){return edges[i];}decltype(auto)operator[](ll i)const{return edges[i];}ll size()const{return edges.size();}friend ostream&operator<<(ostream&o,const graph&g){fo(u,g.size()){o<<"from "<<u<<": ";fo(j,g[u].size())o<<g[u][j]<<string(j!=g[u].size()-1,sp);o<<nl;}return o;}template<class...A>void add_edge(ll a,A&&...b){edges[a].eb(a,std::forward<A>(b)...);}void add_edge(const edge<WT>&e){edges[e.from].eb(e);}vec<edge<WT>>get_edges()const{vec<edge<WT>>res;fo(u,size())fe(edges[u],e)res.eb(e);return res;}};single_testcasevoid solve(){LL(N,M);graph<ll>G(N);fo(i,M){LL(a,b);dec(a,b);G.add_edge(a,b,1,i);G.add_edge(b,a,1,i);}dsu uf(N);vec<ll>dp(N);auto es=G.get_edges();sort(es,[&](auto&a,auto&b){return a.id>b.id;});fe(es,e){if(e.from>e.to)continue;ll nl=uf.merge(e.from,e.to);amax(dp[nl],max(dp[uf.leader(e.from)],dp[uf.leader(e.to)])+1);}pp(dp.max());}}