1 min read
https://leetcode.com/problems/count-and-say/
class Solution {
public:
string countAndSay(int n) {
if (n == 1)
return "1";
string cur = "";
string prev = countAndSay(n - 1);
int count = 0;
for (int i = 0; i < prev.size(); i++) {
count++;
if (i == prev.size() - 1 || prev[i] != prev[i + 1]) {
cur += to_string(count);
cur += prev[i];
count = 0;
}
}
return cur;
}
};