#2652
Sum Multiples
newbie · 120 · lc easy +12 · verified · 85.8% accepted · 590 likes · top 97%
Description
Given a positive integer n, return the sum of all integers in [1, n] that are divisible by 3, 5, or 7.
Example 1:
Input: n = 7
Output: 21
Explanation: Numbers in the range [1, 7] that are divisible by 3, 5, or 7 are 3, 5, 6, 7. The sum of these numbers is 21.
Example 2:
Input: n = 10
Output: 40
Explanation: Numbers in the range [1, 10] that are divisible by 3, 5, or 7 are 3, 5, 6, 7, 9, 10. The sum of these numbers is 40.
Example 3:
Input: n = 9
Output: 30
Explanation: Numbers in the range [1, 9] that are divisible by 3, 5, or 7 are 3, 5, 6, 7, 9. The sum of these numbers is 30.
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