"""Your task is to write function findSum.
   Upto and including n, this function will return the sum of all multiples of 3 and 5.
   For example:
   findSum(5) should return 8 (3 + 5)
   findSum(10) should return 33 (3 + 5 + 6 + 9 + 10)"""


def find(n):
    a = 0
    for el in range(n + 1):
        if (el % 3 == 0) or (el % 5 == 0):
            a += el
    return a
