Oddly Even

2 minutes to read

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

Oddly Even 1

Problem

We need to write a program that is able to take a number as input and print either "odd" or "even" if the number is odd or even. For instance:

1 -> "odd"
2 -> "even"

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 number
  int n;
  scanf("%d", &n);

  // calculate answer
  char* answer = n % 2 ? "odd" : "even";

  // print answer
  puts(answer);

  return 0;
}

C++

#include <iostream>

int main() {
  // take in the number
  int n;
  std::cin >> n;

  // calculate answer
  std::string answer = n % 2 ? "odd" : "even";

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

  return 0;
}

Python

# take in the number
n = int(input())

# calculate answer
answer = 'odd' if n % 2 else 'even'

# print answer
print(answer)

Rust

use std::io;

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

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

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

    // calculate answer
    let answer = if n % 2 == 1 { "odd" } else { "even" };

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

Flag

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

HTB{n0t_3v3n_cl0s3!}