PALIN - The Next Palindrome
A positive integer is called a palindrome if its representation in the decimal system is the same when read from left to right and from right to left. For a given positive integer K of not more than 1000000 digits, write the value of the smallest palindrome larger than K to output. Numbers are always displayed without leading zeros.
Input
The first line contains integer t, the number of test cases. Integers K are given in the next t lines.
Output
For each K, output the smallest palindrome larger than K.
Example
Input: 2 808 2133 Output: 818 2222
Warning: large Input/Output data, be careful with certain languages
hide comments
vritta:
2018-05-31 06:19:02
Thanks Vivek, have been stuck on that problem for days. Now I know it's their fault. |
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vivek_dwivedi:
2018-05-30 04:40:06
very good problem ! total shit test cases even admin don't know that 0 is not a positive no.
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baddu609:
2018-05-27 14:44:10
Check Output for 99 and 999 also! They can be the border case if logic was similar to mine. |
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wrzoboo:
2018-05-24 17:00:16
I can't believe how people managed to do 0.04s in Python3. Through hard fought battle I finally managed to get AC but my time is 3.5s. Any tips on how they might've done it? (inb4 "just optimization LOL")
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ashisha690:
2018-05-22 09:40:03
@ayushtopper string
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ayushtopper:
2018-05-21 09:52:35
Since input can be very very large like 13413515134000000000000000013488097081324
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cabbie:
2018-05-18 02:06:13
Spent so much time on this. But finally got it :) |
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linearspam:
2018-05-06 22:54:09
difficult life lesson: remove printf debugging before submitting... |
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chibaku_tensei:
2018-04-21 16:31:52
Why is the Integer 2 not also an Palindrome ? |
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David Winiecki:
2018-04-09 08:10:24
Don't assume every line ends in a newline. I had to add logic like "if last character of input read from this line is not a number, then remove it (decrement length), else do nothing (don't decrement length)". Took me a very long time to figure that out. Extremely frustrating. :/ |
Added by: | adrian |
Date: | 2004-05-01 |
Time limit: | 2s-9s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: NODEJS PERL6 |