3870. Count Commas in Range

Description

You are given an integer n.

Return the total number of commas used when writing all integers from [1, n] (inclusive) in standard number formatting.

In standard formatting:

• A comma is inserted after every three digits from the right.
• Numbers with fewer than 4 digits contain no commas.

Example 1:

Example 2:

Constraints:

• 1 <= n <= 105

Solutions

Solution 1

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2
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class Solution:
    def countCommas(self, n: int) -> int:
        return max(0, n - 999)

1

1

1

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