Unordered Subsequence

27C1900· candidate master2s256 MB⌨ stdin/stdout

#constructive algorithms #greedy

Examples

Sample 1of 3

Input

5
67 499 600 42 23

Output

3
1 3 5

Sample 2of 3

Input

3
1 2 3

Output

Sample 3of 3

Input

3
2 3 1

Output

3
1 2 3

27C.cpp

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Ln 11·137 BGNU C++20 (64)