leetcode 1400 - Construct K Palindrome Strings

https://leetcode.com/problems/construct-k-palindrome-strings/
https://leetcode.com/problems/construct-k-palindrome-strings/discuss/563379/JavaC%2B%2BPython-Straight-Forward

Given a string s and an integer k. You should construct k non-empty palindrome strings using all the characters in s.

Return True if you can use all the characters in s to construct k palindrome strings or False otherwise.

Example 1:

Input: s = “annabelle”, k = 2
Output: true
Explanation: You can construct two palindromes using all characters in s.
Some possible constructions “anna” + “elble”, “anbna” + “elle”, “anellena” + “b”
Example 2:

Input: s = “leetcode”, k = 3
Output: false
Explanation: It is impossible to construct 3 palindromes using all the characters of s.
Example 3:

Input: s = “true”, k = 4
Output: true
Explanation: The only possible solution is to put each character in a separate string.
Example 4:

Input: s = “yzyzyzyzyzyzyzy”, k = 2
Output: true
Explanation: Simply you can put all z’s in one string and all y’s in the other string. Both strings will be palindrome.
Example 5:

Input: s = “cr”, k = 7
Output: false
Explanation: We don’t have enough characters in s to construct 7 palindromes.

Constraints:

1 <= s.length <= 10^5
All characters in s are lower-case English letters.
1 <= k <= 10^5

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class Solution {
public:
bool canConstruct(string s, int k) {
bitset<26> bits;

for (char c : s)
bits.flip(c-'a');

int odd = bits.count();

return odd <= k && k <= s.size();
}
};