#include <iostream>

/****************************************************************
 * Query the user for two integers, and write two loops:
 *
 *  - The first starts at the smaller integer and proceeds
 *    toward the larger integer with a step size of 2. For
 *    example, given 2 and 7, it should print
 *        2 4 6
 *
 *  - The second prints only the even integers between the
 *    smaller and larger integers, including either endpoint
 *    if it is even.
 ****************************************************************/

// Function declarations
int main();

// Function definitions
int main() {
    int minimum{};
    std::cout << "Enter a first integer: ";
    std::cin  >> minimum;

    int maximum{};
    std::cout << "Enter a second integer: ";
    std::cin  >> maximum;

    if ( minimum > maximum ) {
        // Swap the two values.
        int tmp{ minimum };
        minimum = maximum;
        maximum = tmp;
    }

    for ( ; ; ) {
        std::cout << 0 << " ";
    }

    std::cout << std::endl;

    for ( ; ; ) {
        std::cout << 0 << " ";
    }

    std::cout << std::endl;

    return 0;
}









































// Hint: For the first loop, consider how you
// can change the increment so that the loop
// variable increases by 2 instead of 1.
//
// For the second loop, recall that an integer
// is even if its remainder after division by
// 2 is zero.






























/* Both of these approaches work:

int main() {
    int minimum{};
    std::cout << "Enter a first integer: ";
    std::cin  >> minimum;

    int maximum{};
    std::cout << "Enter a second integer: ";
    std::cin  >> maximum;

    if ( minimum > maximum ) {
        // Swap the two values.
        int tmp{ minimum };
        minimum = maximum;
        maximum = tmp;
    }

    // Start at the minimum and increase by 2.
    for ( int k{ minimum }; k <= maximum; k += 2 ) {
        std::cout << k << " ";
    }

    std::cout << std::endl;

    // Examine every integer, but print only
    // those that are even.
    for ( int k{ minimum }; k <= maximum; ++k ) {
        if ( k%2 == 0 ) {
            std::cout << k << " ";
        }
    }

    std::cout << std::endl;

    return 0;
}

// The second loop above can instead be written
// by first finding the smallest even integer
// in the interval and then increasing by 2.

int main() {
    int minimum{};
    std::cout << "Enter a first integer: ";
    std::cin  >> minimum;

    int maximum{};
    std::cout << "Enter a second integer: ";
    std::cin  >> maximum;

    if ( minimum > maximum ) {
        // Swap the two values.
        int tmp{ minimum };
        minimum = maximum;
        maximum = tmp;
    }

    // Ensure that 'minimum' is even.
    if ( minimum%2 != 0 ) {
        ++minimum;
    }

    for ( int k{ minimum }; k <= maximum; k += 2 ) {
        std::cout << k << " ";
    }

    std::cout << std::endl;

    return 0;
}
*/