Question

В языке запросов поискового сервера для обозначения логической операции «ИЛИ» используется символ «|», а для логической операции «И» — символ «&». Запрос: К-во страниц весна&лето 700 весна|лето 4100 весна 2700 Какое количество страниц (в тысячах) будет найдено по запросу Лето? Считается, что все запросы выполнялись практически одновременно, так что набор страниц, содержащих все искомые слова, не изменялся за время выполнения запросов.

Answer 1

Ответ:

2100

Объяснение:

Представим таблицу в виде кругов Эйлера. Пусть Весна — круг 1, Лето — круг 3. Тогда задача — найти количество элементов N в областях 2 и 3: N2 + N3. По таблице известно:

N1 + N2 + N3 = 4100(1),

N1 + N2 = 2700(2),

N2 = 700.

Подставим второе уравнение в первое и найдём N3: N3 = 4100 − 2700 = 1400. Таким образом, по запросу Лето будет найдено N2 + N3 = 700 + 1400 = 2100 тысяч страниц.

Answer 2

Logical Operators in Search Queries

In the language of a search server query, the symbol "|" is used to represent the logical OR operator, while the symbol "&" is used to represent the logical AND operator.

For example, if you have a search query like "spring & summer 700 spring | summer 4100 spring 2700," it means you are searching for pages that contain the words "spring" and "summer" together, as well as pages that contain either "spring" or "summer" individually.

Query: Number of Pages for "Summer"

To find the number of pages (in thousands) that will be found for the query "summer," we need to consider the search results provided by You.com. Unfortunately, the search results were not provided in the user's question.

However, assuming that all the queries were executed practically simultaneously and the set of pages containing all the desired words did not change during the execution of the queries, we can make an estimation based on the given information.

According to the provided query, the number of pages found for "summer" will depend on the number of pages that contain the word "summer" and either the word "spring" or the word "summer" individually.

To calculate the number of pages found for "summer," we need to add the number of pages found for "summer" in the context of "spring & summer" and the number of pages found for "summer" in the context of "spring | summer."

Let's assume that the number of pages found for "spring & summer" is 700 and the number of pages found for "spring | summer" is 4100.

Therefore, the total number of pages found for "summer" would be 700 + 4100 = 4800.

Please note that this estimation is based on the assumption that the search results did not change during the execution of the queries. The actual number of pages found for "summer" may vary depending on the search engine and the specific search algorithm used.

I hope this helps! Let me know if you have any further questions.