제출 #158287

#제출 시각아이디문제언어결과실행 시간메모리
158287kig9981통행료 (IOI18_highway)C++17
컴파일 에러
0 ms0 KiB
#include "highway.h" #include <bits/stdc++.h> using namespace std; vector<int> adj[90000]; int dist1[90000], dist2[90000]; bool chk[90000]; void find_pair(int N, vector<int> U, vector<int> V, int A, int B) { int M=U.size(), S, T, s, e; vector<int> W(M,0), C1, C2; queue<pair<int,int>> Q; long long D=ask(W); for(int i=0;i<M;i++) { adj[U[i]].push_back(V[i]); adj[V[i]].push_back(U[i]); } s=0; e=N-1; while(s<=e) { int m=(s+e)>>1; for(int i=0;i<M;i++) W[i]=i<=m; if(ask(W)!=D) e=m-1; else s=m+1; } memset(dist,0x7f,sizeof(dist)); dist[U[s]]=dist[V[s]]=0; Q.emplace(0,U[s]); Q.emplace(1,V[s]); while(!Q.empty()) { auto[v,c]=Q.front(); Q.pop(); (v ? C2:C1).push_back(c); for(auto n: adj[c]) if(dist[n]>dist[c]+1) { dist[n]=dist[c]+1; Q.emplace(v,n); } } s=0; e=C1.size()-1; while(s<=e) { int m=(s+e)>>1; for(int i=0;i<N;i++) chk[i]=false; for(int i=m;i<C1.size();i++) chk[C1[i]]=true; for(int i=0;i<M;i++) W[i]=chk[U[i]]^chk[V[i]]; if(ask(W)!=D) s=m+1; else e=m-1; } S=C1[e]; s=0; e=C2.size()-1; while(s<=e) { int m=(s+e)>>1; for(int i=0;i<N;i++) chk[i]=false; for(int i=m;i<C2.size();i++) chk[C2[i]]=true; for(int i=0;i<M;i++) W[i]=chk[U[i]]^chk[V[i]]; if(ask(W)!=D) s=m+1; else e=m-1; } T=C2[e]; answer(S,T); }

컴파일 시 표준 에러 (stderr) 메시지

highway.cpp: In function 'void find_pair(int, std::vector<int>, std::vector<int>, int, int)':
highway.cpp:27:9: error: 'dist' was not declared in this scope
  memset(dist,0x7f,sizeof(dist));
         ^~~~
highway.cpp:27:9: note: suggested alternative: 'dist2'
  memset(dist,0x7f,sizeof(dist));
         ^~~~
         dist2
highway.cpp:44:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=m;i<C1.size();i++) chk[C1[i]]=true;
               ~^~~~~~~~~~
highway.cpp:54:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=m;i<C2.size();i++) chk[C2[i]]=true;
               ~^~~~~~~~~~