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In an alien language, surprisingly they also use english lowercase letters, but possibly in a different
order of the alphabet is some permutation of lowercase letters.
Given a sequence of
words written in the alien language, and the
order of the alphabet, return
true if and only if the given
words are sorted lexicographicaly in this alien language.
You are given a string
s of even length. Split this string into two halves of equal lengths, and let
a be the first half and
b be the second half.
Two strings are alike if they have the same number of vowels (
'U'). Notice that
s contains uppercase and lowercase letters.
b are alike. Otherwise, return
You have an array
arr of length
arr [i] = (2 * i) + 1 for all valid values of
0 <= i < n).
In one operation, you can select two indices
0 <= x, y < n and subtract
arr [x] and add
arr [y] (i.e. perform
arr [x] -=1and
arr [y] += 1). The goal is to make all the elements of the array equal. It is guaranteed that all the elements of the array can be made equal using some operations.
Given an integer
n, the length of the array. Return the minimum number of operations needed to make all the elements of arr equal.
You are given an integer array
nums of length
n which represents a permutation of all the integers in the range
[0, n - 1].
The number of global inversions is the number of the different pairs
(i, j) where:
0 <= i < j < n
nums [i] > nums [j]
The number of local inversions is the number of indices
0 <= i < n - 1
nums [i] > nums [i + 1]
true if the number of global inversions is equal to the number of local inversions.