static List < Integer > getPerfectcubes ( int n ) {
  List < Integer > perfectcubes = new ArrayList < Integer > ( ) ;
  int current = 1 ;
  int i = 1 ;
  while ( current <= n ) {
    perfectcubes . add ( current ) ;
    i += 1 ;
    current = ( int ) ( Math . pow ( i , 3 ) ) ;
  }
  return perfectcubes ;
}

static List < Integer > getPerfectcubes ( int n ) { List < Integer > perfectcubes = new ArrayList < Integer > ( ) ; int current = 1 ; int i = 1 ; while ( current <= n ) { perfectcubes . add ( current ) ; i += 1 ; current = ( int ) ( Math . pow ( i , 3 ) ) ; } return perfectcubes ; }
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