結果
問題 | No.529 帰省ラッシュ |
ユーザー | beet |
提出日時 | 2017-11-07 02:02:47 |
言語 | C++11 (gcc 11.4.0) |
結果 |
TLE
(最新)
AC
(最初)
|
実行時間 | - |
コード長 | 5,939 bytes |
コンパイル時間 | 2,464 ms |
コンパイル使用メモリ | 201,476 KB |
実行使用メモリ | 232,296 KB |
最終ジャッジ日時 | 2024-05-03 06:37:26 |
合計ジャッジ時間 | 23,528 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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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
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 | 9 ms
5,376 KB |
testcase_05 | AC | 9 ms
5,376 KB |
testcase_06 | AC | 10 ms
5,376 KB |
testcase_07 | AC | 10 ms
5,376 KB |
testcase_08 | AC | 821 ms
35,228 KB |
testcase_09 | AC | 1,035 ms
42,164 KB |
testcase_10 | AC | 1,968 ms
76,688 KB |
testcase_11 | AC | 2,017 ms
77,496 KB |
testcase_12 | AC | 538 ms
33,216 KB |
testcase_13 | TLE | - |
testcase_14 | AC | 325 ms
33,380 KB |
testcase_15 | AC | 2,541 ms
79,292 KB |
testcase_16 | AC | 2,476 ms
79,296 KB |
testcase_17 | AC | 826 ms
62,168 KB |
testcase_18 | AC | 815 ms
62,176 KB |
testcase_19 | AC | 828 ms
59,284 KB |
コンパイルメッセージ
main.cpp: In function ‘int main()’: main.cpp:246:8: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 246 | scanf("%d %d %d",&n,&e,&q); | ~~~~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:263:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 263 | scanf("%d",&d); | ~~~~~^~~~~~~~~ main.cpp:266:12: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 266 | scanf("%d %d",&u,&w); | ~~~~~^~~~~~~~~~~~~~~ main.cpp:276:12: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 276 | scanf("%d %d",&s,&t); | ~~~~~^~~~~~~~~~~~~~~ main.cpp: In member function ‘void BiconectedGraph::input(int, int)’: main.cpp:136:12: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 136 | scanf("%d %d",&a,&b); | ~~~~~^~~~~~~~~~~~~~~
ソースコード
#include<bits/stdc++.h> using namespace std; using Int = long long; //BEGIN CUT HERE struct HLDecomposition { int n,pos; vector<vector<int> > G; vector<int> vid, head, heavy, parent, depth, inv, type; HLDecomposition(){} HLDecomposition(int sz): n(sz),pos(0),G(n), vid(n,-1),head(n),heavy(n,-1),parent(n),depth(n),inv(n),type(n){} void add_edge(int u, int v) { G[u].push_back(v); G[v].push_back(u); } void build(vector<int> rs=vector<int>(1,0)) { int c=0; for(int r:rs){ dfs(r, -1); bfs(r, c++); } } //using T = tuple<int,int,int,int,int,int>; typedef tuple<int,int,int,int,int,int> T; int dfs(int curr,int prev) { stack<T> st; int result; int sub,max_sub,i,next; ENTRYPOINT: parent[curr] = prev; sub=1; max_sub=0; for(i=0;i<(int)G[curr].size();i++){ next=G[curr][i]; if(next!=prev) { depth[next]=depth[curr]+1; { st.push(make_tuple(curr,prev,sub,max_sub,i,next)); prev=curr;curr=next; goto ENTRYPOINT; } RETURNPOINT: T t=st.top();st.pop(); curr = get<0>(t); prev = get<1>(t); sub = get<2>(t); max_sub = get<3>(t); i = get<4>(t); next = get<5>(t); //tie(curr,prev,sub,max_sub,i,next)=t; int sub_next=result; sub+=sub_next; if(max_sub<sub_next) max_sub=sub_next,heavy[curr]=next; } } while(!st.empty()){ result=sub; goto RETURNPOINT; } return sub; } void bfs(int r,int c) { int &k=pos; queue<int> q({r}); while(!q.empty()){ int h=q.front();q.pop(); for(int i=h;i!=-1;i=heavy[i]) { type[i]=c; vid[i]=k++; inv[vid[i]]=i; head[i]=h; for(int j:G[i]) if(j!=parent[i]&&j!=heavy[i]) q.push(j); } } } // for_each(vertex) // [l,r] <- attention!! void for_each(int u, int v, const function<void(int, int)>& f) { if (vid[u] > vid[v]) swap(u, v); f(max(vid[head[v]], vid[u]), vid[v]); if (head[u] != head[v]) for_each(u, parent[head[v]], f); } // for_each(edge) // [l,r] <- attention!! void for_each_edge(int u, int v, const function<void(int, int)>& f) { if (vid[u] > vid[v]) swap(u, v); if (head[u] != head[v]){ f(vid[head[v]], vid[v]); for_each_edge(u, parent[head[v]], f); }else{ if(u!=v) f(vid[u]+1,vid[v]); } } int lca(int u,int v){ if(vid[u]>vid[v]) swap(u,v); if(head[u]==head[v]) return u; return lca(u,parent[head[v]]); } int distance(int u,int v){ return depth[u]+depth[v]-2*depth[lca(u,v)]; } }; //END CUT HERE struct BiconectedGraph{ typedef pair<int,int> P; int n; vector<vector<int> > G,C,T; vector<int> ord,low,belong; vector<P> B; BiconectedGraph(){} BiconectedGraph(int sz):n(sz),G(sz),C(sz),T(sz){} void add_edge(int u,int v){ G[u].push_back(v); G[v].push_back(u); } void input(int m,int offset){ int a,b; for(int i=0;i<m;i++){ scanf("%d %d",&a,&b); add_edge(a+offset,b+offset); } } bool is_bridge(int u,int v){ if(ord[u]>ord[v]) swap(u,v); return ord[u]<low[v]; } void dfs(int u,int p,int &k){ ord[u]=low[u]=k; ++k; for(int v:G[u]){ if(v==p) continue; if(ord[v]>=0){ low[u]=min(low[u],ord[v]); }else{ dfs(v,u,k); low[u]=min(low[u],low[v]); } if(is_bridge(u,v)) B.push_back(P(u,v)); } } void fill_component(int c,int u){ C[c].push_back(u); belong[u]=c; for(int v:G[u]){ if(belong[v]>=0||is_bridge(u,v)) continue; fill_component(c,v); } } void add_component(int u,int &k){ if(belong[u]>=0) return; fill_component(k++,u); } int build(){ int k=0; ord.resize(n); low.resize(n); belong.resize(n); fill(ord.begin(),ord.end(),-1); fill(belong.begin(),belong.end(),-1); for(int u=0;u<n;u++){ if(ord[u]>=0) continue; dfs(u,-1,k); } k=0; for(int i=0;i<(int)B.size();i++){ add_component(B[i].first,k); add_component(B[i].second,k); } for(int u=0;u<n;u++) add_component(u,k); for(int i=0;i<(int)B.size();i++){ int u=belong[B[i].first],v=belong[B[i].second]; T[u].push_back(v); T[v].push_back(u); } return k; } }; struct RMQ{ int n; vector<set<int> > dat; RMQ(){} RMQ(int n_){init(n_);} void init(int n_){ n=1; while(n<n_) n*=2; dat.clear(); dat.resize(2*n-1); } void update(int k,int a){ k+=n-1; dat[k].insert(a); while(k){ k=(k-1)>>1; dat[k].insert(a); } } void remove(int k,int a){ k+=n-1; dat[k].erase(a); while(k){ k=(k-1)>>1; dat[k].erase(a); } } int query(int a,int b,int k,int l,int r){ if(r<=a||b<=l) return -1; if(a<=l&&r<=b){ if(dat[k].empty()) return -1; return *--dat[k].end(); } int vl=query(a,b,(k<<1)+1,l,(l+r)>>1); int vr=query(a,b,(k<<1)+2,(l+r)>>1,r); return max(vl,vr); } int query(int a,int b){ return query(a,b,0,0,n); } }; signed main(){ int n,e,q; scanf("%d %d %d",&n,&e,&q); BiconectedGraph big(n); big.input(e,-1); int E=0,V=big.build(); HLDecomposition hl(V+1000); for(int i=0;i<V;i++) for(int j:big.T[i]) if(i<j) hl.add_edge(i,j),E++; hl.build(); RMQ rmq(V); map<int,int> m; int num=0; for(int i=0;i<q;i++){ int d; scanf("%d",&d); if(d==1){ int u,w; scanf("%d %d",&u,&w); u--; u=big.belong[u]; u=hl.vid[u]; m[w]=u; rmq.update(m[w],w); num++; } if(d==2){ int s,t; scanf("%d %d",&s,&t); s--;t--; s=big.belong[s]; t=big.belong[t]; int ans=-1; hl.for_each(s, t, [&](int l, int r) { ans = max(ans,rmq.query(l, r + 1)); }); printf("%d\n",ans); if(~ans) rmq.remove(m[ans],ans),num--; } } return 0; } /* verified on 2017/10/29 https://yukicoder.me/problems/no/529 */