leetcode

0 #pragma GCC optimize("fast")

1 static auto _ = []() {

2 ios_base::sync_with_stdio(false);

3 cin.tie(nullptr);

4 cout.tie(nullptr);

5 return 0;

6 }();

7

8 class Solution {

9 public:

10 string arrangeWords(string &text) {

11 map<int, vector<string>> um;

12 string word, res;

13

14 text[0] = tolower(text[0]);

15 stringstream ss(text);

16 while (ss >> word)

17 um[word.size()].push_back(word);

18

19 res.reserve(text.size());

20 for (const auto &[_, v] : um) {

21 for (const auto &w : v)

22 res += w + " ";

23 }

24 res[0] = toupper(res[0]);

25 res.pop_back();

26 return res;

27 }

28 };