Revert "Fix revert. Ковальчук Александр. Задача 2. Вариант 15. Ленточ… #8375

Job	Run time
ubuntu-gcc-build	1h 22m 5s
ubuntu-clang-build	1h 21m 59s
ubuntu-clang-sanitizer-build	11m 11s
macos-clang-build	16m 29s
ubuntu-gcc-build-codecov	1h 19m 50s
windows-clang-build	31m 46s
windows-msvc-build	1h 22m 18s
	6h 25m 38s

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