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package leetcode._38_;

class Solution {

public String countAndSay(int n) {

String tmp = "1";

if (n == 1) {

return tmp;

}

for (int i = 1; i < n; i++) {

tmp = say(tmp);

}

return tmp;

}

private String say(String numStr) {

char tmp = numStr.charAt(0);

int counter = 1;

StringBuilder sb = new StringBuilder();

for (int i = 1; i < numStr.length(); i++) {

if (numStr.charAt(i) == numStr.charAt(i - 1)) {

counter++;

} else {

sb.append(counter).append(tmp);

tmp = numStr.charAt(i);

counter = 1;

}

}

sb.append(counter).append(tmp);

return sb.toString();

}

}