标签：style blog color io os ar for sp div
The count-and-say sequence is the sequence of integers beginning as follows:1, 11, 21, 1211, 111221, ...
1 is read off as "one 1" or 11.11 is read off as "two 1s" or 21.21 is read off as "one 2, then one 1" or 1211.
Given an integer n, generate the nth sequence.
Note: The sequence of integers will be represented as a string.
Solution:
1 public class Solution { 2 public String countAndSay(int n) { 3 StringBuilder s=new StringBuilder("1"); 4 StringBuilder ss=new StringBuilder(); 5 for(int i=1;i<n;++i){ 6 int j=0; 7 int len=s.length(); 8 while(j<len){ 9 int count=1; 10 char c=s.charAt(j); 11 while(j<len-1&&s.charAt(j)==s.charAt(j+1)){ 12 j++; 13 count++; 14 } 15 ss.append(count+""); 16 ss.append(c); 17 if(j==len-1) 18 break; 19 j++; 20 } 21 s=ss; 22 ss=new StringBuilder(); 23 } 24 return s.toString(); 25 } 26 }
标签：style blog color io os ar for sp div
原文地址：http://www.cnblogs.com/Phoebe815/p/4034179.html
