BinarySearch 0367 Sum of First N Odd Integers

Problem statement

https://binarysearch.com/problems/Sum-of-First-N-Odd-Integers/

Solution

Just use math to get answer of arithmetic sequence, which is n*n.

Complexity

It is O(1) for time and space.

Code

class Solution:
    def solve(self, n):
        return n*n