AtCoder Beginner Contest 178
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Problem Statement
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How many integer sequences $A_1,A_2,\ldots,A_N$ of length $N$ satisfy all of the following conditions?
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$0 \leq A_i \leq 9$- There exists some
$i$such that$A_i=0$holds. - There exists some
$i$such that$A_i=9$holds.
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The answer can be very large, so output it modulo $10^9 + 7$.
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Constraints
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$1 \leq N \leq 10^6$$N$is an integer.
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Input
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Input is given from Standard Input in the following format:
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N
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Output
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Print the answer modulo $10^9 + 7$.
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样例
Input #1
2
Output #1
2
Two sequences $\{0,9\}$ and $\{9,0\}$ satisfy all conditions.
Input #2
1
Output #2
0
Input #3
869121
Output #3
2511445
题目信息
题面与样例版权归 AtCoder 及出题人所有;中文翻译由 AI 生成(CI 管线),如有出入请以原文为准。