static int OddDivCount ( int a , int b ) {
  int res = 0 ;
  for ( int i = a ;
  i <= b ;
  ++ i ) {
    int divCount = divisor ( i ) ;
    if ( divCount % 2 == 1 ) {
      ++ res ;
    }
  }
  return res ;
}

static int OddDivCount ( int a , int b ) { int res = 0 ; for ( int i = a ; i <= b ; ++ i ) { int divCount = divisor ( i ) ; if ( divCount % 2 == 1 ) { ++ res ; } } return res ; }
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