[Leetcode] 38 - Count and Say

原题链接：https://oj.leetcode.com/problems/count-and-say/

这道题其实考的还是细心了，外层循环n，内存循环当前字符长度。

class Solution {public:    string countAndSay(int n) {        string res = "";        if (n < 0) return res;                res = "1";        int i = 1;        while (i < n) {            string temp = "";                        char prev = '-';            int count = 0;            for (int j = 0; j < res.size(); ++j) {                if (prev != res[j]) {                    if (prev != '-') {                        temp.push_back('0' + count);                        temp.push_back(prev);                    }                    prev = res[j];                    count = 1;                } else {                    ++count;                }            }                        temp.push_back('0' + count);            temp.push_back(prev);                        ++i;            res = temp;        }                return res;    }};