HackerRank : Sherlock and The Beast

decentNumber.js

 /*
 * @desc https://www.hackerrank.com/challenges/sherlock-and-the-beast
 * @param integer n 
 * @return array length of n filled with 5s || 3s or False
 */

function decentNumber (n) {

  var head,
      c = n/3, 
      newN = n-5;
    
  if(Number.isInteger(c)){
    return Array(n).fill(5);
  }
  
  for(var i = c; i > 0; i--){
          
     if(newN >= 0){
       
       head = decentNumber(newN);
       
       if(head){
         return head.concat(Array(5).fill(3));
       }
       
       break;
       
     }
  
  }
  
  return false;
   
}