제출 #375108

#제출 시각아이디문제언어결과실행 시간메모리
375108jass921026Meetings (JOI19_meetings)C++14
29 / 100
283 ms1644 KiB
#include "meetings.h" #include<bits/stdc++.h> using namespace std; const int MAXN=302; vector<int> G[MAXN], V[MAXN]; int LCA[MAXN][MAXN]; bool isRoot[MAXN]; void FindEdges(int x){ for(auto i:V[x]) isRoot[i]=1; for(auto i:V[x]){ for(auto j:V[x]){ if(i!=j&&LCA[i][j]!=x&&LCA[i][j]!=i){ isRoot[i]=0; } } } for(auto i:V[x]){ if(isRoot[i]){ G[x].push_back(i); for(auto j:V[x]){ if(i!=j&&LCA[i][j]==i){ V[i].push_back(j); } } } } } void dfs(int x){ FindEdges(x); for(auto i:G[x]){ dfs(i); } } void Solve(int N) { for(int i=1;i<N;i++){ for(int j=i+1;j<N;j++){ int x=Query(0,i,j); LCA[i][j]=LCA[j][i]=x; } } for(int i=1;i<N;i++) V[0].push_back(i); dfs(0); for(int i=0;i<N;i++){ for(auto j:G[i]){ //cout<<i<<" "<<j<<"\n"; int x=min(i,j), y=max(i,j); Bridge(x,y); } } }
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