Zigzags

1400D1900· candidate master2s256 MB⌨ stdin/stdout

#brute force #combinatorics #data structures #math #two pointers

Examples

Sample 1of 1

Input

2
5
2 2 2 2 2
6
1 3 3 1 2 3

Output

5
2

1400D.cpp

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Ln 11·137 BGNU C++20 (64)