Given an?integer?n,?return a string with?n?characters such that each character in such string occurs?an odd number of times.

The returned string must contain only lowercase English letters. If there are multiples valid strings, return?any?of them. ?

?

Example 1:

Input: n = 4

Output: "pppz"

Explanation: "pppz" is a valid string since the character 'p' occurs three times and the character 'z' occurs once. Note that there are many other valid strings such as "ohhh" and "love".

Example 2:

Input: n = 2

Output: "xy"Explanation: "xy" is a valid string since the characters 'x' and 'y' occur once. Note that there are many other valid strings such as "ag" and "ur".

Example 3:

Input: n = 7

Output: "holasss"

easy 題目，不贅述，就是當(dāng)n為偶數(shù)，返回N-1個a加1個b，如果n為奇數(shù)，就返回N個a

Runtime:?1 ms, faster than?80.59%?of?Java?online submissions for?Generate a String With Characters That Have Odd Counts.

Memory Usage:?40.2 MB, less than?58.23%?of?Java?online submissions for?Generate a String With Characters That Have Odd Counts.