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Submission #851116

#TimeUsernameProblemLanguageResultExecution timeMemory
851116AndreiGarden (JOI23_garden)C++17
15 / 100
706 ms4732 KiB
#include <bits/stdc++.h> using namespace std; int n,m,d; bool ap[10000]; int frx[10000]; int fry[10000]; set <int> h[10000]; queue <int> pos[5000]; int firstOcc[5000]; vector <int> upd[10000]; struct S { int sz=0; int prv[10000]; int nxt[10000]; int fr[10000]={0}; int minim=2*d; int maxim=-1; int ans=0; S(vector <pair <int,int>> a) { sz=(int)a.size()/2; for(int i=0; i<2*sz; i++) { fr[a[i].first]=a[i].second; if(i>0) nxt[a[i-1].first]=a[i].first; if(i+1<2*sz) { prv[a[i+1].first]=a[i].first; ans=max(ans,a[i+1].first-a[i].first-1); } minim=min(minim,a[i].first); maxim=max(maxim,a[i].first); } } void Rem(int x) { if(sz==1) { ans=d-1; return; } fr[x]--; if(fr[x]>0 || ap[x]==1) return; if(x>=d) sz--; if(sz==1) { ans=d-1; return; } if(x==minim) { minim=nxt[x]; } else if(x==maxim) { maxim=prv[x]; } else { ans=max(ans,nxt[x]-prv[x]-1); prv[nxt[x]]=prv[x]; nxt[prv[x]]=nxt[x]; } } }; int main() { cin>>n>>m>>d; int cntdy=0; for(int i=1; i<=n; i++) { int p,q; cin>>p>>q; frx[p]++; frx[p+d]++; ap[p]=1; ap[p+d]=1; if(fry[q]==0) cntdy++; fry[q]++; fry[q+d]++; } for(int i=1; i<=m; i++) { int r,s; cin>>r>>s; frx[r]++; frx[r+d]++; h[s].insert(r); h[s+d].insert(r); } vector <pair <int,int>> aux; for(int i=0; i<2*d; i++) if(frx[i]>0) aux.push_back(make_pair(i,1)); int ans=(int)1e9; for(int i=0; i<d; i++) firstOcc[i]=-1; for(int i=0; i<2*d; i++) { for(auto it:h[i]) { pos[it].push(i); if(pos[it].front()==i) firstOcc[it]=i; if(pos[it].front()==i-d) { pos[it].pop(); firstOcc[it]=pos[it].front(); } } for(int j=0; j<2*d; j++) upd[j].clear(); for(int j=0; j<d; j++) { if(firstOcc[j]>=0) { upd[firstOcc[j]].push_back(j); upd[firstOcc[j]].push_back(j+d); } } S A(aux); int cnt=0; for(int j=i; j>=0; j--) { for(int it:upd[j]) A.Rem(it); if(fry[j]>0) cnt++; if(cnt>=cntdy) ans=min(ans,(i-j+1)*(d-A.ans)); } } cout<<ans<<"\n"; return 0; }
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