leetcode

0 class Solution {

1 public:

2 string maximumOddBinaryNumber(const string &s) const {

3 const int n = size(s);

4 string res(n, '0');

5 int cnt = 0;

6 for (int i = 0; i < n; i++) {

7 if (s[i] == '1') res[cnt++] = '1';

8 }

9 if (cnt == n) return s;

10 res[--cnt] = '0', res.back() = '1';

11 return res;

12 }

13 };