Happy Numbers Programming challenge description: A happy number is defined by the following process. Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number equals 1 (where it will stay), or it loops endlessly in a cycle which does not include 1. Those numbers for which this process ends in 1 are happy numbers, while those that do not end in 1 are unhappy numbers. Input: Your program should read lines of text from standard input. Each line contains a single positive integer, N. Output: happy number, print 1 to standard 1 process.stdin.resume(); 2 process.stdin.setEncoding('utf8'); 3 4 let stdin = ''; 5 process.stdin.on('data', (chunk) => { 6 stdin= $(stdin)${chunk}'; 7)).on('end', () => { 8 const lines = stdin.trim().split('\n'); for (const line of lines) { 9 10 process.stdout.write('$(line)\n'); 11 } 12 }); 13 I Test Case Output

Happy Numbers Programming challenge description: A happy number is defined by the following process. Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number equals 1 (where it will stay), or it loops endlessly in a cycle which does not include 1. Those numbers for which this process ends in 1 are happy numbers, while those that do not end in 1 are unhappy numbers. Input: Your program should read lines of text from standard input. Each line contains a single positive integer, N. Output: happy number, print 1 to standard 1 process.stdin.resume(); 2 process.stdin.setEncoding('utf8'); 3 4 let stdin = ''; 5 process.stdin.on('data', (chunk) => { 6 stdin= $(stdin)${chunk}'; 7)).on('end', () => { 8 const lines = stdin.trim().split('\n'); for (const line of lines) { 9 10 process.stdout.write('$(line)\n'); 11 } 12 }); 13 I Test Case Output

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Happy Numbers
Programming challenge description:
A happy number is defined by the following process.
Starting with any positive integer, replace the number by
the sum of the squares of its digits, and repeat the process
until the number equals 1 (where it will stay), or it loops
endlessly in a cycle which does not include 1. Those
numbers for which this process ends in 1 are happy
numbers, while those that do not end in 1 are unhappy
numbers.
Input:
Your program should read lines of text from standard
input. Each line contains a single positive integer, N.
Output:
If the number is a happy number, print 1 to standard
output. Otherwise, print 0.
1 process.stdin.resume();
2 process.stdin.setEncoding('utf8');
3
4 let stdin = '';
5 process.stdin.on('data', (chunk) => {
stdin = '$(stdin)${chunk}";
7)).on('end', () => {
6
9
8 const lines = stdin.trim().split('\n');
for (const line of lines) {
process.stdout.write('$(line)\n');
10
11
}
12 });
13
H
> Test Case Output
&
G
e

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