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andrew-field / projecteuler-go

Testing and practising Go with Project Euler
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Challenge 19: Counting Sundays #22

Closed andrew-field closed 6 years ago

andrew-field commented 6 years ago

You are given the following information, but you may prefer to do some research for yourself.

1 Jan 1900 was a Monday.
Thirty days has September,
April, June and November.
All the rest have thirty-one,
Saving February alone,
Which has twenty-eight, rain or shine.
And on leap years, twenty-nine.
A leap year occurs on any year evenly divisible by 4, but not on a century unless it is divisible by 400.

How many Sundays fell on the first of the month during the twentieth century (1 Jan 1901 to 31 Dec 2000)?

andrew-field commented 6 years ago

"Unfortunately", Go makes this too easy with its great time package. The program is easy to follow.