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Сколько существует таких программ, которые исходное число 3 преобразуют в число 20 и при этом траектория вычислений программы содержит число 9 и число 12?","type":"unstyled","key":"5786s"},{"data":{},"depth":0,"entityRanges":[],"inlineStyleRanges":[{"length":166,"offset":0,"style":"BOLD"}],"text":"Задача разбивается на 3 этапа. Сначала считаем от 3 до 9. Затем от 9 до 12. Затем от 12 до 20. 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