Create 2048-next-greater-numerically-balanced-number.js

Author: everthis

2048-next-greater-numerically-balanced-number.js

@@ -0,0 +1,23 @@
+/**
+ * @param {number} n
+ * @return {number}
+ */
+const nextBeautifulNumber = function(n) {
+    while (true) {
+        ++n;
+        if (balance(n)) return n;
+    } 
+    function balance(n) {
+        let cnt = Array(10).fill(0);
+        while (n) {
+            if (n % 10 == 0) return false; // no 0 allowed
+            cnt[n % 10]++;
+            n = ~~(n / 10);
+        }
+        for (let i = 1; i < 10; ++i) {
+            if (cnt[i] && cnt[i] !== i) return false;
+        }
+        return true;
+    }
+};
+