/**
 * @param {number} N
 * @return {boolean}
 */
var isArmstrong = function(N) {
    var strN = N.toString();
    var length = strN.length;
    var target = 0;
    for (var i = 0; i < length; i  ) {
      target  = help(Number(strN[i]),length);
    }
    if (target == N) {
      return true;
    }
    return false;
};

function help(number, p) {
  var result = 1;
  for (var i = 0;i < p; i  ) {
    result *= number;
  }
  return result;
}