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.


The first line contains integer t, the number of test cases. Integers K are given in the next t lines.


For each K, output the smallest palindrome larger than K.




Warning: large Input/Output data, be careful with certain languages

hide comments
gourgan: 2020-02-29 11:15:10


Last edit: 2020-02-29 11:16:31
atulav: 2020-01-12 12:10:03

Finally did it after years.

sayan_244: 2019-12-19 07:11:03

LOL! can the input number have leading zeroes??
I am having a hard time getting rid of them.... :/

ashwanitr001: 2019-12-01 12:14:56

For people getting WA try test cases like 0,99,199
The outputs should be 1,101,202 respectively

harindra2002: 2019-11-23 14:10:06

should we input the values given in the example or leave the input to the computer?

aneeshs_7901: 2019-11-19 16:19:14

its giving wrong answer everytime i submit.its working fine and the output is correct in ideone

binit_54: 2019-10-15 06:22:42

can someone give me some idea on how to store the strings in this problem for later access when all the input has been finished?

pranay19263: 2019-10-10 08:19:56

giving runtime error all the time
beside it is fully working on ideone

suryansh_singh: 2019-10-06 18:31:42

i written my code without using nested loop ,then also it raising ' time exceeded limit'
just used this ( if str(m)==str(m)[::-1]: ) in python3,
does anyone facing same problem?

saurabh2012: 2019-10-06 16:17:23

Last edit: 2019-10-06 16:21:22

Added by:adrian
Time limit:2s-9s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Languages:All except: NODEJS PERL6

Problem's scores 1 vote

Concept difficulty
Concept difficulty 37%
Implementation difficulty
Implementation difficulty 50%
458 16