https://github.com/saadmairaj/henngechallenge
A challenge from HENNGE intended for backend position or global internship applicants.
https://github.com/saadmairaj/henngechallenge
challenge golang hennge python
Last synced: 4 months ago
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A challenge from HENNGE intended for backend position or global internship applicants.
- Host: GitHub
- URL: https://github.com/saadmairaj/henngechallenge
- Owner: Saadmairaj
- Created: 2021-03-25T14:58:58.000Z (about 4 years ago)
- Default Branch: main
- Last Pushed: 2021-03-25T15:30:36.000Z (about 4 years ago)
- Last Synced: 2024-11-14T22:22:10.235Z (6 months ago)
- Topics: challenge, golang, hennge, python
- Language: Go
- Homepage:
- Size: 10.7 KB
- Stars: 3
- Watchers: 1
- Forks: 2
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# HENNGEchallenge
This challenge is intended for backend position or global internship applicants.
## *Mission 1:* Write a program which fulfills the requirements below
### Description
- We want you to calculate the sum of squares of given integers, excluding any negatives.
- The first line of the input will be an integer `N (1 <= N <= 100)`, indicating the number of test cases to follow.
- Each of the test cases will consist of a line with an integer `X (0 < X <= 100)`, followed by another line consisting of X number of space-separated integers `Yn (-100 <= Yn <= 100)`.
- For each test case, calculate the sum of squares of the integers, excluding any negatives, and print the calculated sum in the output.
- **Note 1:** There should be no output until all the input has been received.
- **Note 2:** Do not put blank lines between test cases solutions.
- **Note 3:** Take input from standard input, and output to standard output.
### Rules
- Write your solution using [Go Programming Language](http://golang.org/)
- Your source code must be a single file (package main)
- Do not use any for statement
- You may only use standard library packages
### Sample Input
```pythonn
2
4
3 -1 1 14
5
9 6 -53 32 16
```
### Sample Output
```python
206
1397
```
## *Mission 2:* Publish your source code as a secret gist
### Description
Publish your source code as a secret gist. You will need a GitHub account to create a secret gist, if you are not familiar with secret gists, follow the instructions [here](https://help.github.com/articles/creating-gists).
Please make sure not to publish it as a public gist.
We will take a look at your source code later, after you achieve Mission 3.
Your program will be auto-tested, so please be strict about the input/output.
**Note:** Make sure to upload only a single golang file with your solution and no additional files.
## *Mission 3:* Send us the URL of your work
### Description
First, construct a JSON string like below:
```
{
"github_url": "https://gist.github.com/YOUR_ACCOUNT/GIST_ID",
"contact_email": "EMAIL"
}
```
Fill in your email address for EMAIL, and the path to your secret gist for YOUR_ACCOUNT/GIST_ID. Be sure you have double-checked your email address; we will contact you by email.
Then, make an HTTP POST request to the following URL with the JSON string as the body part.
https://api.challenge.hennge.com/challenges/003
**Content type**
The Content-Type: of the request must be application/json.
**Authorization**
The URL is protected by HTTP Basic Authentication, which is explained on Chapter 2 of RFC2617, so you have to provide an Authorization: header field in your POST request
- For the userid of HTTP Basic Authentication, use the same email address you put in the JSON string.
- For the password, provide a 10-digit time-based one time password conforming to RFC6238 TOTP.
**Authorization password**
For generating the TOTP password, you will need to use the following setup:
- You have to read RFC6238 (and the errata too!) and get a correct one time password by yourself.
- TOTP's Time Step X is 30 seconds. T0 is 0.
- Use HMAC-SHA-512 for the hash function, instead of the default HMAC-SHA-1.
- Token shared secret is the userid followed by ASCII string value "HENNGECHALLENGE003" (not including double quotations).
**Shared secret examples**
- For example, if the userid is "[email protected]", the token shared secret is "[email protected]".
- For example, if the userid is "[email protected]", the token shared secret is "[email protected]"
If your POST request succeeds, the server returns HTTP status code 200.
### Rules
- You do not have to disclose how you achieved this mission at this time. Do not hesitate to use source codes or tools on the net, but do the exploring process by yourself of course, do not ask your friend to help you. The only thing that matters is that it works!
- No bruteforce attacks, please!
**Sample Request**
```
POST /challenges/003 HTTP/1.1
Authorization: Basic bmluamFAZXhhbXBsZS5jb206MTU5NTk0MjU2MA==
Host: api.challenge.hennge.com
Accept: */*
Content-Type: application/json
Content-Length: 104
{"contact_email":"[email protected]", "github_url":"https://gist.github.com/hennge/b859bd12e7a7fb418141"}
```
**Sample Response**
```
HTTP/1.1 200 OK
Content-Type: application/json
Date: Wed, 26 Jun 2019 02:15:16 GMT
Transfer-Encoding: chunked
{"message":"Congratulations! You have achieved mission 3"}
```