Dotted Thousands

Easy

You are given a non-negative integer n. Write its decimal form as a string, splitting the digits into groups of three from right to left and putting a dot . between the groups. The leftmost group may have one, two or three digits. Return the resulting string.

Example 1

n=45067 → '45.067'

The last three digits 067 are split off, leaving 45 in front: "45.067".

Example 2

n=812 → '812'

The number has only three digits, so no separator is needed.

Example 3

n=3000000 → '3.000.000'

Two full groups of zeros are split off with dots: "3.000.000".

Constraints

0 ≤ n ≤ 2³¹ − 1

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String

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Input

n=45067

Expected

'45.067'

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