public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  int k = sc . nextInt ( ) ;
  int [ ] arr = new int [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    arr [ i ] = sc . nextInt ( ) ;
  }
  Arrays . sort ( arr ) ;
  int sum = 0 ;
  for ( int i = 0 ;
  i < n && k > 0 ;
  i ++ ) {
    arr [ i ] = arr [ i ] - sum ;
    if ( arr [ i ] == 0 ) {
      continue ;
    }
    else {
      System . out . println ( arr [ i ] ) ;
      sum += arr [ i ] ;
      k -- ;
    }
  }
  while ( k > 0 ) {
    System . out . println ( 0 ) ;
    k -- ;
  }
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; int k = sc . nextInt ( ) ; int [ ] arr = new int [ n ] ; for ( int i = 0 ; i < n ; i ++ ) { arr [ i ] = sc . nextInt ( ) ; } Arrays . sort ( arr ) ; int sum = 0 ; for ( int i = 0 ; i < n && k > 0 ; i ++ ) { arr [ i ] = arr [ i ] - sum ; if ( arr [ i ] == 0 ) { continue ; } else { System . out . println ( arr [ i ] ) ; sum += arr [ i ] ; k -- ; } } while ( k > 0 ) { System . out . println ( 0 ) ; k -- ; } }
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