Create 1780-check-if-number-is-a-sum-of-powers-of-three.js

Author: everthis

1780-check-if-number-is-a-sum-of-powers-of-three.js

@@ -0,0 +1,11 @@
+/**
+ * @param {number} n
+ * @return {boolean}
+ */
+const checkPowersOfThree = function(n) {
+  const num = ~~(n / 3)
+  const rem = n % 3
+  if(num === 0 && rem === 1) return true
+  if(rem === 2) return false
+  return checkPowersOfThree(num)
+};