public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  n = sc . nextInt ( ) ;
  k = sc . nextInt ( ) ;
  arrX = new long [ n ] ;
  arrY = new long [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    arrX [ i ] = sc . nextLong ( ) ;
    arrY [ i ] = sc . nextLong ( ) ;
  }
  long min = Long . MAX_VALUE ;
  for ( int i = 0 ;
  i < n - 1 ;
  i ++ ) {
    for ( int j = i + 1 ;
    j < n ;
    j ++ ) {
      for ( int k = 0 ;
      k < n - 1 ;
      k ++ ) {
        for ( int l = k + 1 ;
        l < n ;
        l ++ ) {
          long sqr = Math . abs ( arrX [ i ] - arrX [ j ] ) * Math . abs ( arrY [ k ] - arrY [ l ] ) ;
          if ( sqr > min ) {
            continue ;
          }
          if ( isOver ( Math . min ( arrX [ i ] , arrX [ j ] ) , Math . max ( arrX [ i ] , arrX [ j ] ) , Math . min ( arrY [ k ] , arrY [ l ] ) , Math . max ( arrY [ k ] , arrY [ l ] ) ) ) {
            min = sqr ;
          }
        }
      }
    }
  }
  System . out . println ( min ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; n = sc . nextInt ( ) ; k = sc . nextInt ( ) ; arrX = new long [ n ] ; arrY = new long [ n ] ; for ( int i = 0 ; i < n ; i ++ ) { arrX [ i ] = sc . nextLong ( ) ; arrY [ i ] = sc . nextLong ( ) ; } long min = Long . MAX_VALUE ; for ( int i = 0 ; i < n - 1 ; i ++ ) { for ( int j = i + 1 ; j < n ; j ++ ) { for ( int k = 0 ; k < n - 1 ; k ++ ) { for ( int l = k + 1 ; l < n ; l ++ ) { long sqr = Math . abs ( arrX [ i ] - arrX [ j ] ) * Math . abs ( arrY [ k ] - arrY [ l ] ) ; if ( sqr > min ) { continue ; } if ( isOver ( Math . min ( arrX [ i ] , arrX [ j ] ) , Math . max ( arrX [ i ] , arrX [ j ] ) , Math . min ( arrY [ k ] , arrY [ l ] ) , Math . max ( arrY [ k ] , arrY [ l ] ) ) ) { min = sqr ; } } } } } System . out . println ( min ) ; }
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