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T112.java
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45 lines (39 loc) · 1.06 KB
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/**
* @Author:Aliyang
* @Data: Created in 上午10:18 18-6-15
* count-and-say：我的解法
* 思路：计数
**/
public class T112 {
public String countAndSay(int n) {
StringBuilder res=new StringBuilder();
if (n==0)
return res.toString();
if (n==1)
return "1";
String pre="1";
for (int i=2;i<=n;i++){
char c=pre.charAt(0);
int count=1;
for (int j=1;j<=pre.length();j++){
if (j<pre.length()&&pre.charAt(j)==c)
count++;
else {
res.append(""+count+c);
if (j<pre.length()){
c=pre.charAt(j);
count=1;
}
else break;
}
}
pre=res.toString();
res.delete(0,res.length()+1);
}
return pre.toString();
}
public static void main(String[] args){
T112 t=new T112();
System.out.println(t.countAndSay(100));
}
}