原题链接：https://leetcode.com/problems/count-and-say/description/
奶奶的，这道题本身题意都不好读懂，然后即使明白了也还是没有写出解答来，所以最后还是无耻的抄袭了讨论区的答案！
首先要读懂题意：https://www.2cto.com/kf/201507/416783.html
然后是解答：
/**
* Created by clearbug on 2018/2/26.
*/
public class Solution {
public static void main(String[] args) throws InterruptedException {
Solution s = new Solution();
System.out.println(s.countAndSay(6)); // 312211
}
public String countAndSay(int n) {
String s = "1";
for (int i = 1; i < n; i++) {
StringBuilder sb = new StringBuilder();
for (int j = 1, count = 1; j <= s.length(); j++) {
if (j == s.length() || s.charAt(j - 1) != s.charAt(j)) {
sb.append(count);
sb.append(s.charAt(j - 1));
count = 1;
} else {
count++;
}
}
s = sb.toString();
}
return s;
}
}