static int getDifference ( int l , int r ) {
  int total = r - l + 1 ;
  int primes = prime [ r ] - prime [ l - 1 ] ;
  int composites = total - primes ;
  return ( Math . abs ( primes - composites ) ) ;
}

static int getDifference ( int l , int r ) { int total = r - l + 1 ; int primes = prime [ r ] - prime [ l - 1 ] ; int composites = total - primes ; return ( Math . abs ( primes - composites ) ) ; }
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