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.
代码语言：javascript复制 public String countAndSay(int n) {
String init = "1";
for (int i = 1; i < n; i ) {
init = countAndSay(init);
}
return init;
}
String countAndSay(String string) {
char[] str = string.toCharArray();
String s = "";
int p = 1;
int count = 1;
char last = str[0];
for (; p < str.length; p ) {
if (str[p] == last) {
count ;
} else {
s = "" count last;
count = 1;
last = str[p];
}
}
s = "" count last;
return s;
}
