text: 
  // In this program we will check whether a number is an Armstrong number 
  // An Armstrong number is a three-digit number in which 
  // the sum of the cube of the digits is equal to the number itself. 
  // Hence 153 is an Armstrong number -> 1^3 + 5^3 + 3^3 = 153
  
  
  process.stdin.setEncoding("utf-8");
  var str = "";
  process.stdin.on("data", (data) => {
    str += data;
  });
  process.stdin.on("end", () => {
    str = str.split("\n");
    var number = str[0];
    var temp = number;
    var answer = 0;
    var rem = 0;
    var n = 0;
    while (temp != 0) {
      temp = Math.floor(temp / 10);
      n++;
    }
  
    temp = number;
  
    while (temp != 0) {
      rem = Math.floor(temp % 10);
      answer = answer + Math.pow(rem, n);
      temp = Math.floor(temp / 10);
    }
  
    if (answer == number)
      console.log(number + " is an Armstrong number.");
    else
      console.log(number + " is not an Armstrong number.");
  
  });
  // Example
  // Input: 371
  // Output: 371 is an Armstrong number.
  // Explanation 3*3*3+7*7*7+1*1*1 = 371
  
  // Example
  // Input: 321
  // Output: 321 is not an Armstrong number.
  // Explanation 3*3*3+2*2*2+1*1*1 = 44
  
  // Example
  // Input: 4321
  // Output: 4321 is not an Armstrong number.
  // Explanation 4*4*4*4+3*3*3*3+2*2*2*2+1*1*1*1 = 354
  
  // Example
  // Input: 1634
  // Output: 1634 is an Armstrong number.
  // Explanation 1*1*1*1+6*6*6*6+3*3*3*3+4*4*4*4 = 1634
  
  // Example
  // Input: 0
  // Output: 0 is an Armstrong number.
  // Explanation 0 = 0
  
  