Create 38-count-and-say.js

Author: everthis

38-count-and-say.js

@@ -0,0 +1,21 @@
+/**
+ * @param {number} n
+ * @return {string}
+ */
+const countAndSay = function(n) {
+  let str = '1'
+  for (let i = 2; i <= n; i++) {
+    let tempStr = ''
+    let count = 0
+    for (let j = 0, m = str.length; j < m; j++) {
+      const char = str.charAt(j)
+      count += 1
+      if (char !== str.charAt(j + 1)) {
+        tempStr += count + char
+        count = 0
+      }
+    }
+    str = tempStr
+  }
+  return str
+}