Addition

2 minutes to read

We are given the following website to write a coding solution:

Addition 1

Problem

We need to write a program that is able to take two numbers as input and print their sum. For instance:

1, 2 -> 3

Solution

Since we are allowed to use C, C++, Python and Rust, let’s write a solution on every language, just because.

C

#include <stdio.h>

int main() {
  // take in the numbers
  int a;
  int b;
  scanf("%d", &a);
  scanf("%d", &b);

  // calculate answer
  int answer = a + b;

  // print answer
  printf("%d\n", answer);

  return 0;
}

C++

#include <iostream>

int main() {
  // take in the numbers
  int a;
  int b;
  std::cin >> a;
  std::cin >> b;

  // calculate answer
  int answer = a + b;

  // print answer
  std::cout << answer << std::endl;

  return 0;
}

Python

# take in the numbers
a = int(input())
b = int(input())

# calculate answer
answer = a + b

# print answer
print(answer)

Rust

use std::io;

fn main() {
    // take in the numbers
    let mut input = String::new();

    io::stdin()
        .read_line(&mut input)
        .expect("Failed to read line");

    let a: i32 = input.trim().parse().expect("Please enter a valid number");

    input.clear();

    io::stdin()
        .read_line(&mut input)
        .expect("Failed to read line");

    let b: i32 = input.trim().parse().expect("Please enter a valid number");

    // calculate answer
    let answer = a + b;

    // print answer
    println!("{}", answer);
}

Flag

Using any of these programs, we are able to solve the chalenge and capture the flag:

HTB{aDd1nG_4lL_tH3_waY_up_2_th3_t0p}