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Question C — Ubiquity of Atcoder Beginner contest 178
How many integer sequences A1, A2,…, AN of length N satisfy all of the following conditions? 0≤Ai≤9 There exists some such that Ai=0 holds. There exists some I such that Ai=9 holds. The answer can be very large, so output it modulo 10^9+7.
Explain this question please, and what should I learn to solve such types of questions?. Thank YOU
| Rev. | Язык | Кто | Когда | Δ | Комментарий | |
|---|---|---|---|---|---|---|
| en2 |
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seemyprogressnothandle | 2020-09-13 20:11:17 | 45 | ||
| en1 |
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seemyprogressnothandle | 2020-09-13 20:07:37 | 399 | Initial revision (published) |
