Woburn Challenge 2015-16 Round 4 - Junior Division
James Bond is preparing to embark on a particularly dangerous mission – catching ruthless Canadian ice wine smugglers. He'll be attending a secret (but elegant) wine tasting party at the smugglers' hideout, with the intention of causing a huge distraction and sneaking further into their lair. If only there were a way to suddenly disrupt the wine tasting process for all of the guests…
Fortunately for Bond, Q has an idea. According to his research, the
glass which the wine glasses are made of has a resonance frequency of
Hz. If a loud noise were to be emitted in
the room, with a frequency which is an exact multiple of the glass's
resonance frequency, the wine glasses could be made to all shatter at
once, giving Bond just the kind of distraction he'll need!
Q has developed
fancy watches for this mission.
Aside from helping Bond look the part of a rich wine collector (and be
able to tell the time), the watches have powerful auditory emitters
embedded within them! The
-th watch can emit noise at a frequency of
Hz.
Though all watches can keep time accurately, only the ones with
frequencies which are exact multiples of
Hz will be of use to Bond
for this mission. Please help Q count how many of his watches he could
potentially give to Bond!
Input Specification
The first line of input consists of two space-separated integers and
.
The next lines each consist of a single integer
, for
.
Output Specification
Output a single integer – the number of watches which are able to break the glass.
Sample Input
4 2000
6000
1000
2000
20001
Sample Output
2
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