제출 #158178

#제출 시각아이디문제언어결과실행 시간메모리
158178kig9981통행료 (IOI18_highway)C++17
69 / 100
352 ms15132 KiB
#include "highway.h" #include <bits/stdc++.h> using namespace std; vector<int> adj[90000]; set<int> gv[90000]; int g[90000]; void find_pair(int N, vector<int> U, vector<int> V, int A, int B) { int M=U.size(), sg=0, tg=1, gnum=1; vector<int> W(M,1); long long dist=ask(W); for(int b=1;;b<<=1) { for(int i=0;i<M;i++) W[i]=(U[i]^V[i])&b ? 0:1; if((dist-ask(W))/(B-A)&1) { for(int i=0;i<N;i++) gv[g[i]=(i&b) ? 1:0].insert(i); break; } } while(gv[sg].size()>1) { ++gnum; for(auto c: gv[sg]) { gv[gnum].insert(c); g[c]=gnum; if(2*gv[gnum].size()>=gv[sg].size()) break; } for(auto c: gv[gnum]) gv[sg].erase(c); for(int i=0;i<M;i++) W[i]=(g[U[i]]==gnum)==(g[V[i]]==gnum); if((dist-ask(W))/(B-A)&1) sg=gnum; } while(gv[tg].size()>1) { ++gnum; for(auto c: gv[tg]) { gv[gnum].insert(c); g[c]=gnum; if(2*gv[gnum].size()>=gv[tg].size()) break; } for(auto c: gv[gnum]) gv[tg].erase(c); for(int i=0;i<M;i++) W[i]=(g[U[i]]==gnum)==(g[V[i]]==gnum); if((dist-ask(W))/(B-A)&1) tg=gnum; } answer(*gv[sg].begin(),*gv[tg].begin()); }
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