제출 #1216505

#제출 시각아이디문제언어결과실행 시간메모리
1216505LeonidCukConnecting Supertrees (IOI20_supertrees)C++20
컴파일 에러
0 ms0 KiB
#include "supertrees.h" #include <bits/stdc++.h> using namespace std; vector<bool>vis; void dfs(int i,vector<vector<int>>&p,vector<vector<int>>&res) { int n=p.size(); vis[j]=true; for(int j=0;j<n;j++) { if(i==j)continue; if(p[i][j]==1&&vis[j]==0) { res[i][j]=1; dfs(j,p,res); } } vector<int>ok; ok.push_back(i); for(int j=0;j<n;j++) { if(i==j)continue; if(p[i][j]==2&&vis[j]==0) { res[i][j]=1; vis[j]=1; ok.push_back(j); } } ok.push_back(i); if(ok.size()==2)return; for(int j=1;j<ok.size();j++) { res[ok[j]][ok[j-1]]=1; } } int construct(vector<vector<int>> p) { int n=p.size(); vis.resize(n); for(int i=0;i<n;i++) { for(int j=0;j<n;j++) { if(p[i][j]==3)return 0; } } vector<vector<int>>res(n,vector<int>(0)); for(int i=0;i<n;i++) { if(vis[i]==0)dfs(i,p,res); } build(res); return 1; }

컴파일 시 표준 에러 (stderr) 메시지

supertrees.cpp: In function 'void dfs(int, std::vector<std::vector<int> >&, std::vector<std::vector<int> >&)':
supertrees.cpp:8:9: error: 'j' was not declared in this scope
    8 |     vis[j]=true;
      |         ^