Cells in a Range on an Excel Sheet LeetCode solution in C++

1
class Solution {
2
 public:
3
  vector<string> cellsInRange(string s) {
4
    vector<string> ans;
5

6
    for (char ch = s[0]; ch <= s[3]; ch++) {
7
      for (int i = s[1] - '0'; i <= s[4] - '0'; i++) {
8
        string res = "";
9
        res += ch;
10
        res += to_string(i);
11
        ans.push_back(res);
12
      }
13
    }
14
    return ans;
15
  }
16
};