IYPT 1994, Задачи на турнира — Задача 16. The Moon and the Sun

7th IYPT (1994)

Условие

“If you are asked what is more important, The Sun or the Moon, you should answer the Moon. For the Sun shines in daytime when there is enough light without it,” says a joke. When is it possible to see the Sun and the Moon at the same time? Calculate the schedule of the events for the European countries during 1994.

Решение

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Оригинал в Архива: 1994.txt