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
h(key)=19 *(ASCII(a1)*1+...+ASCII(an)*n).
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.
Input
t [the number of test cases <= 100]
n1 [the number of operations (one per line)[<= 1000]
ADD:string
[or]
DEL:string
[other test cases, without empty lines betwee series]
Output
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]
Example
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
hide comments
andrefgard:
2024-06-04 20:49:26
dont forget to receive the number of operations for each case Last edit: 2024-06-05 22:37:41 |
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justynagruba:
2021-07-04 11:03:36
Hi, can anyone help me? I do it 4th day. I have WA. |
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Amitayush Thakur:
2021-07-03 15:48:12
Print an empty line after every test case, costed me many WAs. |
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petr_ivashkov:
2020-07-23 20:19:02
Note following:
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taber:
2019-02-22 03:50:44
1
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Varkha Sharma:
2018-02-03 15:40:00
1
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zhaoweicheng98:
2017-10-14 10:17:05
Try this test case:
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Saif :
2017-06-16 13:59:08
Use this test case:
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kspoj:
2017-06-16 08:57:40
Guys, I'm stuck, my code is running fine with most spoj toolkit testcases... But I'm getting WA...
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rishi_devan:
2017-05-01 14:40:08
Straightforward ! |
Added by: | mima |
Date: | 2004-06-01 |
Time limit: | 3s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: NODEJS PERL6 VB.NET |
Resource: | - |