Ch-4-Prob-New-권의회

2279 days ago by matrix

Permutation([2,3,1,4,7,6,5]).inversions() 
        
[[0, 2], [1, 2], [4, 5], [4, 6], [5, 6]]
[[0, 2], [1, 2], [4, 5], [4, 6], [5, 6]]
Permutation([2,3,1,4,7,6,5]).number_of_inversions() 
        
5
5
Permutation([2,3,1,4,7,6,5]).is_even() 
        
False
False