Sum Is Everywhere with Solution

 

Sum Is Everywhere:

Problem Description:

You are given a number N and find the sum of the first N odd and even numbers in a line separated by space. All even and odd numbers should be greater than 0.

Input:

·       First-line will contain the number N.

Output:

Print the sum of the first N odd and even numbers in a line separated by space.

Constraints

·       1≤N≤10⁶

Sample Input 1:

            4

Sample Output 1:

            16 20

Sample Input 2:

            1

Sample Output 2:

            1 2

EXPLANATION:

·       In the first example, (1 + 3 + 5 + 7) = 16 and (2 + 4 + 6 + 8) = 20.

·       In the second example, only one odd that is 1 and only one even that is 2.

Solution:

C++:

#include <iostream>
using namespace std;
int main()
{
    long n;
    cin >> n;
    cout << n * n << " "; //formula for odd numbers
    cout << n * (n + 1);  //formula for even numbers
    return 0;
}

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