facebook Hacker cup: studious Student problem.
- by smartmuki
During the qualification round, the following question was asked:
You've been given a list of words to study and memorize. Being a diligent
student of language and the arts, you've decided to not study them at all
and instead make up pointless games based on them. One game you've come up with
is to see how you can concatenate the words to generate the lexicographically
lowest possible string.
Input
As input for playing this game you will receive a text file containing
an integer N, the number of word sets you need to play your game against. This
will be followed by N word sets, each starting with an integer M, the
number of words in the set, followed by M words. All tokens in the input will
be separated by some whitespace and, aside from N and M, will consist entirely
of lowercase letters.
Output
Your submission should contain the lexicographically shortest strings for
each corresponding word set, one per line and in order.
Constraints
1 <= N <= 100
1 <= M <= 9
1 <= all word lengths <= 10
Example input
5
6 facebook hacker cup for studious students
5 k duz q rc lvraw
5 mybea zdr yubx xe dyroiy
5 jibw ji jp bw jibw
5 uiuy hopji li j dcyi
Example output
cupfacebookforhackerstudentsstudious
duzklvrawqrc
dyroiymybeaxeyubxzdr
bwjibwjibwjijp
dcyihopjijliuiuy
The program I wrote goes as:
chomp($numberElements=<STDIN>);
for(my $i=0; $i < $numberElements; $i++)
{
my $string;
chomp ($string = <STDIN>);
my @array=split(/\s+/,$string);
my $number=shift @array;
@sorted=sort @array;
$sortedStr=join("",@sorted);
push(@data,$sortedStr);
}
foreach (@data)
{
print "$_\n";
}
The program gives the correct output for the given test cases but still facebook shows it to be incorrect. Is there something wrong with the program??
