Introduction If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23. Find the sum of all the multiples of 3 or 5 below N. Input and Output Format 1 2 3 4 5 6 7 # Input: 2 10 100 # Output: 23 2318 {: file="Input and Output” }