cf/mirror

Permutation

CF
452F2700· international gm1s256 MB⌨ stdin/stdout
#data structures#divide and conquer#hashing

Examples

Sample 1of 2
Input
4
1 3 4 2
Output
NO
Sample 2of 2
Input
5
1 5 2 4 3
Output
YES
452F.cpp
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Ln 11·137 BGNU C++20 (64)