Two arrays are called similar if one can be obtained from another by swapping at most one pair of elements in one of the arrays.

Given two arrays a and b, check whether they are similar.

Example

• • For a = [1, 2, 3] and b = [1, 2, 3], the output should be

    areSimilar(a, b) = true.

    The arrays are equal, no need to swap any elements.

  • For a = [1, 2, 3] and b = [2, 1, 3], the output should be

    areSimilar(a, b) = true.

    We can obtain b from a by swapping 2 and 1 in b.

  • For a = [1, 2, 2] and b = [2, 1, 1], the output should be

    areSimilar(a, b) = false.

    Any swap of any two elements either in a or in b won't make aand b equal.

 

 

我的解答：

1 def areSimilar(a, b): 2     count = 0 3     if sorted(a) == sorted(b): 4         for i in zip(a,b): 5             if i[0] != i[1]: 6                 count +=1 7         if count > 2: 8             return False 9         else:10             return True11     else:12         return False

 

膜拜大佬：

def areSimilar(A, B):    return sorted(A)==sorted(B) and sum([a!=b for a,b in zip(A,B)])<=2