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A set of solar experiments is to be made at observatories. Each experiment begins on a given day of the year and ends on a given day (each experiment is repeated for several years). An observatory can perform only one experiment at a time. The problem is: what is the minimum number of observatories required to perform a given set of experiments annually?

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Answer:

Explanation:

The step by step explanation is given in the attached document.

A set of solar experiments is to be made at observatories. Each experiment begins-example-1
User Alex Telishev
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