Day Number in the Year

Easy

A date is written as the string stamp in the format YYYY-MM-DD (Gregorian calendar). Return which day of its year it is: 1 January is day 1, 2 January is day 2, and so on. As a reminder, a year is a leap year if it is divisible by 4 but not by 100, or if it is divisible by 400. February has 29 days in a leap year.

Example 1

stamp='2016-03-01' → 61

January has 31 days, February 2016 has 29 (a leap year), plus 1 day of March: 61.

Example 2

stamp='1900-12-31' → 365

1900 is divisible by 100 but not by 400, so it is not a leap year and has 365 days.

Constraints

len(stamp) = 10, positions 4 and 7 hold hyphens, and every other character is a digit
The date exists and lies between 1 January 1900 and 31 December 2019

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Topics

Math String

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Input

stamp='2016-03-01'

Expected

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