Ehab and the Expected XOR Problem

1174D1900· candidate master1s256 MB⌨ stdin/stdout

#bitmasks #constructive algorithms

Examples

Sample 1of 3

Input

3 5

Output

3
6 1 3

Sample 2of 3

Input

2 4

Output

3
1 3 1

Sample 3of 3

Input

1 1

Output

1174D.cpp

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Ln 11·137 BGNU C++20 (64)