Time: 8 ms (56.33%), Space: 41.7 MB (63.58%) - LeetHub

Author: hajin-kim

0038-count-and-say/0038-count-and-say.kt

@@ -0,0 +1,32 @@
+class Solution {
+    fun countAndSay(n: Int): String {
+        var result = "1"
+
+        repeat(n - 1) {
+            val newResult = StringBuilder()
+            
+            var count = 1
+            var prev = result[0].digitToInt()
+
+            for (i in 1 until result.length) {
+                val num = result[i].digitToInt()
+                if (num == prev) {
+                    ++count
+                }
+                else {
+                    newResult.append(count)
+                    newResult.append(prev)
+
+                    prev = num
+                    count = 1
+                }
+            }
+            newResult.append(count)
+            newResult.append(prev)
+
+            result = newResult.toString()
+        }
+
+        return result
+    }
+}