結果
問題 | No.274 The Wall |
ユーザー | Taiki0715 |
提出日時 | 2024-11-01 22:12:21 |
言語 | C++23 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 8 ms / 2,000 ms |
コード長 | 6,850 bytes |
コンパイル時間 | 6,312 ms |
コンパイル使用メモリ | 319,736 KB |
実行使用メモリ | 6,820 KB |
最終ジャッジ日時 | 2024-11-01 22:12:39 |
合計ジャッジ時間 | 7,042 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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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
6,816 KB |
testcase_01 | AC | 2 ms
6,816 KB |
testcase_02 | AC | 2 ms
6,820 KB |
testcase_03 | AC | 2 ms
6,820 KB |
testcase_04 | AC | 2 ms
6,816 KB |
testcase_05 | AC | 2 ms
6,816 KB |
testcase_06 | AC | 2 ms
6,816 KB |
testcase_07 | AC | 2 ms
6,816 KB |
testcase_08 | AC | 2 ms
6,820 KB |
testcase_09 | AC | 2 ms
6,816 KB |
testcase_10 | AC | 2 ms
6,820 KB |
testcase_11 | AC | 2 ms
6,816 KB |
testcase_12 | AC | 7 ms
6,816 KB |
testcase_13 | AC | 2 ms
6,820 KB |
testcase_14 | AC | 3 ms
6,816 KB |
testcase_15 | AC | 4 ms
6,820 KB |
testcase_16 | AC | 2 ms
6,820 KB |
testcase_17 | AC | 2 ms
6,816 KB |
testcase_18 | AC | 2 ms
6,820 KB |
testcase_19 | AC | 6 ms
6,820 KB |
testcase_20 | AC | 7 ms
6,820 KB |
testcase_21 | AC | 7 ms
6,816 KB |
testcase_22 | AC | 7 ms
6,820 KB |
testcase_23 | AC | 8 ms
6,816 KB |
testcase_24 | AC | 7 ms
6,816 KB |
testcase_25 | AC | 7 ms
6,816 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #if __has_include(<atcoder/all>) #include <atcoder/all> #endif using ll=long long; using ull=unsigned long long; using P=pair<ll,ll>; template<typename T>using minque=priority_queue<T,vector<T>,greater<T>>; template<typename T>bool chmax(T &a,const T &b){return (a<b?(a=b,true):false);} template<typename T>bool chmin(T &a,const T &b){return (a>b?(a=b,true):false);} template<typename T1,typename T2>istream &operator>>(istream &is,pair<T1,T2>&p){is>>p.first>>p.second;return is;} template<typename T>istream &operator>>(istream &is,vector<T> &a){for(auto &i:a)is>>i;return is;} template<typename T1,typename T2>void operator++(pair<T1,T2>&a,int n){a.first++,a.second++;} template<typename T1,typename T2>void operator--(pair<T1,T2>&a,int n){a.first--,a.second--;} template<typename T>void operator++(vector<T>&a,int n){for(auto &i:a)i++;} template<typename T>void operator--(vector<T>&a,int n){for(auto &i:a)i--;} #define reps(i,a,n) for(int i=(a);i<int(n);i++) #define rep(i,n) reps(i,0,n) #define all(x) x.begin(),x.end() #define pcnt(x) __builtin_popcountll(x) #define fin(x) return cout<<x<<'\n',static_cast<void>(0) ll myceil(ll a,ll b){return (a+b-1)/b;} template<typename T,size_t n,size_t id=0> auto vec(const int (&d)[n],const T &init=T()){ if constexpr (id<n)return vector(d[id],vec<T,n,id+1>(d,init)); else return init; } #ifdef LOCAL #include<debug.h> #else #define debug(...) static_cast<void>(0) #define debugg(...) static_cast<void>(0) template<typename T1,typename T2>ostream &operator<<(ostream &os,const pair<T1,T2>&p){os<<p.first<<' '<<p.second;return os;} #endif void SOLVE(); int main(){ ios::sync_with_stdio(false); cin.tie(nullptr); cout<<fixed<<setprecision(16); #ifdef LOCAL clock_t start=clock(); #endif int testcase=1; //cin>>testcase; for(int i=0;i<testcase;i++){ SOLVE(); } #ifdef LOCAL cerr<<"time:"; cerr<<(clock()-start)/1000; cerr<<"ms\n"; #endif } template<typename T=int> struct Edge{ int from,to; T weight; int index; Edge(int from_,int to_,T weight_=T(),int index_=-1):from(from_),to(to_),weight(weight_),index(index_){} Edge():from(-1),to(-1),weight(),index(-1){} friend std::ostream &operator<<(std::ostream &os,const Edge&e){ os<<'['; os<<"from:"<<e.from; os<<"to:"<<e.to; os<<"weight:"<<e.weight; os<<"index:"<<e.index; os<<']'; return os; } }; using namespace std; template<typename T=int> struct Graph{ private: int n; vector<Edge<T>>edge; vector<Edge<T>>g; vector<int>ptr; bool directed; struct graph_range{ using iterator=typename vector<Edge<T>>::iterator; iterator l,r; iterator begin()const{return l;} iterator end()const{return r;} int size()const{return r-l;} Edge<T> &operator[](int i)const{return l[i];} }; struct const_graph_range{ using iterator=typename vector<Edge<T>>::const_iterator; iterator l,r; iterator begin()const{return l;} iterator end()const{return r;} int size()const{return r-l;} const Edge<T> &operator[](int i)const{return l[i];} }; public: Graph(int n_,bool dir_):n(n_),directed(dir_){} Graph():n(0){} Graph(int n_,bool dir_,const vector<Edge<T>>&e):n(n_),directed(dir_),edge(e){build();} template<bool weighted=false,bool index=1> void read(int m){ edge.reserve(m); for(int i=0;i<m;i++){ int u,v; cin>>u>>v; T w; if constexpr(index)u--,v--; if constexpr(weighted)cin>>w; else w=1; edge.emplace_back(u,v,w,i); } build(); } void add_edge(int u,int v){ int id=edge.size(); edge.emplace_back(u,v,1,id); } void add_edge(int u,int v,T w){ int id=edge.size(); edge.emplace_back(u,v,w,id); } void add_edge(int u,int v,T w,int index){ edge.emplace_back(u,v,w,index); } void build(){ vector<int>cnt(n+1,0); for(const Edge<T>&e:edge){ cnt[e.from+1]++; if(!directed)cnt[e.to+1]++; } for(int i=1;i<=n;i++)cnt[i]+=cnt[i-1]; ptr=cnt; g.resize(cnt[n]); for(const Edge<T>&e:edge){ g[cnt[e.from]++]=e; if(!directed)g[cnt[e.to]++]=Edge<T>(e.to,e.from,e.weight,e.index); } } void reverse(){ if(directed){ for(Edge<T>&e:edge)swap(e.from,e.to); build(); } } inline void to_directed(){ directed=true; build(); } inline void to_undirected(){ directed=false; build(); } void reserve(int m){edge.reserve(m);} graph_range operator[](int i){return graph_range{g.begin()+ptr[i],g.begin()+ptr[i+1]};} const_graph_range operator[](int i)const{return const_graph_range{g.begin()+ptr[i],g.begin()+ptr[i+1]};} const Edge<T>& get_edge(int i)const{return edge[i];} inline bool is_directed()const{return directed;} inline int size()const{return n;} inline int edge_size()const{return edge.size();} }; template<typename T> vector<int>strongly_connected_components(Graph<T>g){ int n=g.size(); vector<bool>seen(n,false); vector<int>st(g.edge_size()+1); int p=0; vector<int>vis; vis.reserve(n); for(int i=0;i<n;i++)if(!seen[i]){ st[p++]=i; while(p>0){ int x=st[--p]; if(x<0){ vis.push_back(~x); continue; } if(seen[x])continue; seen[x]=true; st[p++]=~x; for(const Edge<T>&e:g[x])if(!seen[e.to])st[p++]=e.to; } } vector<int>scc(n,-1); g.reverse(); int sp=0; for(int i=n-1;i>=0;i--)if(scc[vis[i]]==-1){ st[p++]=vis[i]; while(p>0){ int x=st[--p]; scc[x]=sp; for(const Edge<T>&e:g[x])if(scc[e.to]==-1)st[p++]=e.to; } sp++; } return scc; } using namespace std; vector<int>two_sat(int n,const vector<pair<int,int>>&a){ Graph<int>g(n*2,true); g.reserve(a.size()*2); for(const auto&[u,v]:a){ if(u>=0&&v>=0){ g.add_edge(u+n,v); g.add_edge(v+n,u); } else if(u>=0){ g.add_edge(u+n,(~v)+n); g.add_edge(~v,u); } else if(v>=0){ g.add_edge(~u,v); g.add_edge(v+n,(~u)+n); } else{ g.add_edge(~u,(~v)+n); g.add_edge(~v,(~u)+n); } } g.build(); vector<int>scc=strongly_connected_components(g); vector<int>ret(n); for(int i=0;i<n;i++){ if(scc[i]==scc[i+n])return vector<int>{}; ret[i]=scc[i]>scc[i+n]; } return ret; } void SOLVE(){ int n,m; cin>>n>>m; vector<pair<int,int>>a(n); rep(i,n){ cin>>a[i]; a[i].second++; } vector<pair<int,int>>b; rep(i,n-1)reps(j,i+1,n){ bool f=max(a[i].first,a[j].first)>=min(a[i].second,a[j].second); bool g=max(a[i].first,m-a[j].second)>=min(a[i].second,m-a[j].first); if(f&&g)continue; else if(!f&&!g)fin("NO"); else if(f){ b.push_back({~i,j}); b.push_back({i,~j}); } else{ b.push_back({i,j}); b.push_back({~i,~j}); } } cout<<(two_sat(n,b).size()?"YES":"NO")<<endl; }