static void printGraph ( ArrayList < ArrayList < Integer >> adj ) {
  for ( int i = 0 ;
  i < adj . size ( ) ;
  i ++ ) {
    System . out . println ( "\nAdjacency list of vertex" + i ) ;
    for ( int j = 0 ;
    j < adj . get ( i ) . size ( ) ;
    j ++ ) {
      System . out . print ( " -> " + adj . get ( i ) . get ( j ) ) ;
    }
    System . out . println ( ) ;
  }
}

static void printGraph ( ArrayList < ArrayList < Integer > > adj ) { for ( int i = 0 ; i < adj . size ( ) ; i ++ ) { System . out . println ( " \n Adjacency ▁ list ▁ of ▁ vertex " + i ) ; for ( int j = 0 ; j < adj . get ( i ) . size ( ) ; j ++ ) { System . out . print ( " ▁ - > ▁ " + adj . get ( i ) . get ( j ) ) ; } System . out . println ( ) ; } }
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