cf/mirror

Uniqueness

CF
1208B1500· specialist2s256 MB⌨ stdin/stdout
#binary search#brute force#implementation#two pointers

Examples

Sample 1of 3
Input
3
1 2 3
Output
0
Sample 2of 3
Input
4
1 1 2 2
Output
2
Sample 3of 3
Input
5
1 4 1 4 9
Output
2
1208B.cpp
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Ln 11·137 BGNU C++20 (64)