AtCoder Japan Open -予選-(AtCoder Regular Contest 186)
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Problem Statement
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You are given a sequence of integers $(X_1,\dots,X_M)$ of length $M$ consisting of $1,\dots,K$.
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Find the number of sequences $(A_1,\dots,A_N)$ of length $N$ consisting of $1,\dots,K$ that satisfy the following condition, modulo $998244353$:
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- Among all sequences of length
$M$consisting of$1,\dots,K$, the only sequence that cannot be obtained as a (not necessarily contiguous) subsequence of$(A_1,\dots,A_N)$is$(X_1,\dots,X_M)$.
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Constraints
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$2\le M,K \le N \le 400$$1\le X_i \le K$- All input values are integers.
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Input
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The input is given from Standard Input in the following format:
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N M K
X_1 X_2 \dots X_M
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Output
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Print the number of sequences satisfying the condition, modulo $998244353$.
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样例
Input #1
5 2 3
1 1
Output #1
4
The following four sequences satisfy the condition:
- $(2, 3, 1, 2, 3)$
- $(2, 3, 1, 3, 2)$
- $(3, 2, 1, 2, 3)$
- $(3, 2, 1, 3, 2)$
Input #2
400 3 9
1 8 6
Output #2
417833302
Input #3
29 3 10
3 3 3
Output #3
495293602
Input #4
29 3 10
3 3 4
Output #4
0
题目信息
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