Submission #56301

#TimeUsernameProblemLanguageResultExecution timeMemory
56301YehezkielICC (CEOI16_icc)C++11
90 / 100
215 ms944 KiB
#include "icc.h" #include <bits/stdc++.h> using namespace std; #define fi first #define se second #define mp make_pair #define pb push_back #define eb emplace_back #define all(x) (x).begin(),(x).end() typedef pair<int,int> pii; const int MAXN=100; int par[MAXN+5],n; int finds(int x){ if(par[x]!=x) par[x]=finds(par[x]); return par[x]; } bool connected(int u,int v){ return (finds(u)==finds(v)); } void gabung(int u,int v){ u=finds(u),v=finds(v); if(u==v) return; par[v]=u; } int tanya(vector <int> a,vector <int> b){ //O(N) int arr1[105];int arr2[105]; for(int i=0;i<(int) a.size();i++) arr1[i]=a[i]; for(int i=0;i<(int) b.size();i++) arr2[i]=b[i]; return query(a.size(),b.size(),arr1,arr2); } void print(vector <int> arr){ cout<<"printing arr"<<endl; for(int i=0;i<(int) arr.size();i++) cout<<arr[i]<<" "; cout<<endl; } void expand(vector <int> &vec){ //isinya cuman kepala suku O(N) bool root[MAXN+5]; for(int i=1;i<=n;i++) root[i]=false; for(auto isi:vec) root[isi]=true; vec.clear(); for(int i=1;i<=n;i++) if(root[finds(i)]) vec.pb(i); } void shrink(vector <int> &vec){ int n=0; for(int i=0;i<(int) vec.size();i++) { if(par[vec[i]]==vec[i]) vec[n++]=vec[i]; } vec.resize(n); } void masukkan(vector <int> &tampung,const vector <int> tambahan){ for(int isi:tambahan) tampung.pb(isi); } int perkecil(vector <int> now,const vector <int> other){ //O(NlogN) int nomor[MAXN+5],n=0; for(int i=0;i<(int) now.size();i++) { if(now[i]==par[now[i]]) nomor[now[i]]=n++; } vector <vector <int> > temp1,temp2; temp1.resize(n),temp2.resize(n); for(int i=0;i<(int) now.size();i++) temp1[nomor[finds(now[i])]].pb(now[i]); while(true) //O(logN) { int total=0,lebih=0; for(int i=0;i<n;i++) { total+=temp1[i].size(); lebih+=temp1[i].size()%2; } if(total==1) break; lebih/=2; //cout<<totalnya "<<total<<endl; now.clear(); for(int i=0;i<n;i++) { random_shuffle(all(temp1[i])); int ambil=temp1[i].size()/2; if(temp1[i].size()&1&&lebih) ambil++,lebih--; temp2[i].clear(); for(int j=ambil;j<(int) temp1[i].size();j++) temp2[i].pb(temp1[i][j]); temp1[i].resize(ambil); masukkan(now,temp1[i]); } assert(lebih==0); assert(abs( (int)now.size() - ( total - (int)now.size() ) )<=1); if(tanya(now,other)==0) //O(N) { for(int i=0;i<n;i++) temp1[i]=temp2[i]; } } for(int i=0;i<n;i++) { if(temp1[i].size()==1) return temp1[i][0]; } assert(false); return 0; } void bagiDua(vector <int> &vec,int &lebih,vector<vector<int> > &tampung){ random_shuffle(all(vec)); int ambil=vec.size()/2; if(lebih&&(vec.size()&1)) lebih--,ambil++; vector <int> kiri,kanan; for(int i=0;i<(int) vec.size();i++) { if(i<ambil) kiri.pb(vec[i]); else kanan.pb(vec[i]); } tampung.pb(kiri);tampung.pb(kanan); } vector <int> kiri,kanan; void findAnggota(){ vector <vector <int> > anggota,baru; anggota.resize(1); for(int i=1;i<=n;i++) { if(par[i]==i) anggota[0].pb(i); } //cout<<"MULAI"<<endl; for(int loop=0;;loop++) { baru.clear(); int lebih=0; for(auto &isi:anggota) lebih+=isi.size()%2; lebih/=2; int terbesar=-1; for(auto &isi:anggota) { terbesar=max(terbesar,(int) isi.size()); bagiDua(isi,lebih,baru); } assert(terbesar>1); kiri.clear();kanan.clear(); for(int i=0;i<(int) baru.size();i++) { for(auto isi:baru[i]) { if(i&1) kanan.pb(isi); else kiri.pb(isi); } } assert(lebih==0); assert(abs((int) kiri.size() - (int) kanan.size())<=1); expand(kiri),expand(kanan); if(tanya(kiri,kanan)) break; anggota=baru; } } void run(int _n){ srand(0); n=_n; for(int i=1;i<=n;i++) par[i]=i; for(int i=0;i<n-1;i++) { findAnggota(); //cout<<"found"<<endl; pii ans; ans=mp(perkecil(kiri,kanan),perkecil(kanan,kiri)); setRoad(ans.fi,ans.se); gabung(ans.fi,ans.se); } }
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