Palindromic Problem

1913F2800· international gm5s512 MB⌨ stdin/stdout

#binary search #data structures #hashing #string suffix structures #strings

Examples

Sample 1of 3

Input

5
aabaa

Output

15
aaaaa

Sample 2of 3

Input

5
aaaaa

Output

15
aaaaa

Sample 3of 3

Input

4
awoo

Output

7
aooo

1913F.cpp

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Ln 11·137 BGNU C++20 (64)