POJ1291-并查集/dfs(四)
nbsp;{ fax = find( x1 ); fay = find( y2 ); if( fax==fay ){ f = false; continue; } fax = find( x2 ); fay = find( y1 ); if( fax==fay ){ f = false;
continue; } union_ab( x1,y1 ); union_ab( x2,y2 ); addedge( x1,y1 ); addedge( x2,y2 ); } } if( f==false ) { puts("Inconsistent"); continue; }//specail judge for(