#define PROBLEM "https://yukicoder.me/problems/4387" #include using namespace std; #define call_from_test #ifndef call_from_test #include using namespace std; #endif //BEGIN CUT HERE template vector read(size_t n){ vector ts(n); for(size_t i=0;i>ts[i]; return ts; } //END CUT HERE #ifndef call_from_test signed main(){ return 0; } #endif #ifndef call_from_test #include using namespace std; #endif //BEGIN CUT HERE struct RangeToRange{ const int n; int ptr; RangeToRange(int n):n(n),ptr(3*n){} // (0n, 2n) : top segtree (to) // (2n, 4n) : bottom segtree (from) // map [3n, 4n) -> [n, 2n) template void add_edge(int u,int v,F f){ if(3*n<=u and u<4*n) u-=2*n; f(u,v); } template void init(F f){ for(int i=1;i [l2, r2) template void add_edge(int l1,int r1,int l2,int r2,F f,G g){ int k=ptr++; for(l1+=n,r1+=n;l1>=1,r1>>=1){ if(l1&1) add_edge(2*n+(l1++),k,f); if(r1&1) add_edge(2*n+(--r1),k,f); } for(l2+=n,r2+=n;l2>=1,r2>>=1){ if(l2&1) g(k,l2++); if(r2&1) g(k,--r2); } } int idx(int v)const{return 1*n+v;} size_t size()const{return ptr;} }; //END CUT HERE #ifndef call_from_test //INSERT ABOVE HERE signed main(){ return 0; } #endif #ifndef call_from_test #include using namespace std; #endif //BEGIN CUT HERE struct SCC{ vector< vector > G,R,T,C; vector vs,used,blg; SCC(){} SCC(int n):G(n),R(n),used(n),blg(n){} void add_edge(int u,int v){ G[u].emplace_back(v); R[v].emplace_back(u); } void dfs(int v){ used[v]=1; for(int u:G[v]) if(!used[u]) dfs(u); vs.emplace_back(v); } void rdfs(int v,int k){ used[v]=1; blg[v]=k; C[k].emplace_back(v); for(int u:R[v]) if(!used[u]) rdfs(u,k); } int build(){ int n=G.size(); for(int v=0;v=0;i--){ if(!used[vs[i]]){ T.emplace_back(); C.emplace_back(); rdfs(vs[i],k++); } } for(int v=0;v>n>>a>>b; auto xs=read(n); RangeToRange G(n); SCC scc(G.size()+n+n); auto f=[&](int u,int v){scc.add_edge(u,v);}; G.init(f); for(int i=0;i cnt; for(int i=0;i