38. Count and Say (java)

Author: bluesword12350

solution/0038.Count and Say/Solution.java

@@ -0,0 +1,23 @@
+class Solution {
+    public String countAndSay(int n) {
+        String one = "1";
+        while (n > 1) {
+            one = say(one);
+            n--;
+        }
+        return one;
+    }
+
+    private String say(String las) {
+        StringBuilder sBuilder = new StringBuilder();
+        int l = 1;
+        for (int i = 0; i < las.length(); i++) {
+            if (i < las.length() - 1 && las.charAt(i) == las.charAt(i + 1)) l++;
+            else {
+                sBuilder.append(l).append(las.charAt(i));
+                l = 1;
+            }
+        }
+        return sBuilder.toString();
+    }
+}