Sum of odd and even elements
School Accuracy: 45.46% Submissions: 22 Points: 0

Given an integer N, find the sum of odd numbers and even numbers from 1 to N.

Example 1:

Input: 5
Output: 9 6
Explanation: Odd numbers upto 5 are 1, 3, 5
and their sum = 1 + 3 + 5 = 9.Even numbers
upto 5 are 2 and 4 and their sum = 2 + 4 = 6.


Example 1:

Input: 6
Output: 9 12
Explanation: Odd numbers upto 6 are 1, 3, 5
and their sum = 1 + 3 + 5 = 9.Even numbers
upto 5 are 2 , 4 and 6 and their
sum = 2 + 4 + 6  = 12.


You don't need to read or print anything, Your task is to complete the function find_sum() which takes N as input parameter and returns a list of two numbers where first numbers is sum of odd numbers and second number is sum of even numbers.

Expected Time Complexity: O(1)
Expected Space Complexity: O(1)

Constraints:
1 <= N <= 104