HASHIT - Hash it!
Your task is to calculate the result of the hashing process in a table of 101 elements, containing keys that are strings of length at most 15 letters (ASCII codes 'A',...,'z'). Implement the following operations:
- find the index of the element defined by the key (ignore, if no such element),
- insert a new key into the table (ignore insertion of the key that already exists),
- delete a key from the table (without moving the others), by marking the position in table as empty (ignore non-existing keys in the table)
When performing find, insert and delete operations define the following function:
integer Hash(string key),
which for a string key=a1...an returns the value:
Hash(key)=h(key) mod 101, where
Resolve collisions using the open addressing method, i.e. try to insert the key into the table at the first free position: (Hash(key)+j2+23*j) mod 101, for j=1,...,19. After examining of at least 20 table entries, we assume that the insert operation cannot be performed.
t [the number of test cases <= 100]
n1 [the number of operations (one per line)[<= 1000]
DEL:string [other test cases, without empty lines betwee series]
For every test case you have to create a new table, insert or delete keys, and write to the output:
the number of keys in the table [first line]
index:key [sorted by indices]
Input: 1 11 ADD:marsz ADD:marsz ADD:Dabrowski ADD:z ADD:ziemii ADD:wloskiej ADD:do ADD:Polski DEL:od DEL:do DEL:wloskiej Output: 5 34:Dabrowski 46:Polski 63:marsz 76:ziemii 96:z
There should be a blank line after every test case .. that cost me 2WA
can anyone help me working for test cases but still getting WA
Empty string is also considered to be a valid key, and it have to be put on the position 0. It cost me few WAs to realize that.Last edit: 2016-10-23 13:43:45
guys just use http://spojtoolkit.com/ to get extra test cases.
AC after 5 WA ....be careful about the deletion and insertion of same elements multiple time:
SHIT is a substring of HASHIT :/ :D
j cannot be 20..!!
Awesome problem. Lesson learned.
Santosh Kumar Shaw:
j can be 20. AC on the go.