/in/foo.cc: In function 'void dfs(int, int)':
/in/foo.cc:13:16: error: 'hashi' was not declared in this scope
             if(hashi[i]!=-1)
                ^~~~~
/in/foo.cc:18:8: error: 'hashi' was not declared in this scope
     if(hashi[aa]!=-1&&hashi[bb]!=-1&&hashi[cc]!=-1){ // dou tians shang le 
        ^~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:181:12: error: 'hashi' was not declared in this scope
     memset(hashi,-1,sizeof(hashi));
            ^~~~~