1360. Number of Days Between Two Dates

https://leetcode.com/problems/number-of-days-between-two-dates

Description

Write a program to count the number of days between two dates.

The two dates are given as strings, their format is YYYY-MM-DD as shown in the examples.

Example 1:

**Input:** date1 = "2019-06-29", date2 = "2019-06-30"
**Output:** 1

Example 2:

**Input:** date1 = "2020-01-15", date2 = "2019-12-31"
**Output:** 15

Constraints:

• The given dates are valid dates between the years 1971 and 2100.

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