PHONELST - Phone List
Phone List Given a list of phone numbers, determine if it is consistent in the sense that no number is the prefix of another. Let’s say the phone catalogue listed these numbers:
• Emergency 911
• Alice 97 625 999
• Bob 91 12 54 26
In this case, it’s not possible to call Bob, because the central would direct your call to the emergency line as soon as you had dialled the first three digits of Bob’s phone number. So this list would not be consistent.
The first line of input gives a single integer, 1 <= t <= 40, the number of test cases. Each test case starts with n, the number of phone numbers, on a separate line, 1 <= n <= 10000. Then follows n lines with one unique phone number on each line. A phone number is a sequence of at most ten digits.
For each test case, output “YES” if the list is consistent, or “NO” otherwise.
Input: 2 3 911 97625999 91125426 5 113 12340 123440 12345 98346 Output: NO YES
|Added by:||Andres Galvis|
|Cluster:||Cube (Intel Pentium G860 3GHz)|
|Languages:||All except: ERL JS NODEJS PERL 6 SCM chicken VB.net|
|Resource:||Nordic Collegiate Programming Contest 2007|
Even simple quicksort does :/
Trie works !
Easy python there. Logic is good.Last edit: 2015-02-18 17:02:23
@californiagurl yes , they can be same and they are to be treated as different entries .
are any two numbers exactly same? if so, should they be treated as different entries or not?
DanFT [ICMC - USP]:
was gettin TLE, switched from cin,cout to scanf, printf got AC
can be done by a simple sort
@mohannad abdullah hassan yes
Downloaded the sample testcases from the <Resource> & compared my output against the correct output; it matches. But WA here. Strange.