AtCoder Regular Contest 113
D
Sky Reflector
AtCoder
⌀ 1389
原题
← CE →
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Problem Statement

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In a grid with $N$ horizontal rows and $M$ vertical columns of squares, we will write an integer between $1$ and $K$ (inclusive) on each square and define sequences $A, B$ as follows:

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  • for each $i=1,\dots, N$, $A_i$ is the minimum value written on a square in the $i$-th row;
  • for each $j=1,\dots, M$, $B_j$ is the maximum value written on a square in the $j$-th column.
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Given $N, M, K$, find the number of different pairs of sequences that can be $(A, B)$, modulo $998244353$.

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Constraints

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  • $1 \leq N,M,K \leq 2\times 10^5$
  • All values in input are integers.
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Input

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Input is given from Standard Input in the following format:

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N M K

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Output

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Print the number of different pairs of sequences that can be $(A, B)$, modulo $998244353$.

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样例

Input #1
2 2 2
Output #1
7
$(A_1,A_2,B_1,B_2)$ can be $(1,1,1,1)$, $(1,1,1,2)$, $(1,1,2,1)$, $(1,1,2,2)$, $(1,2,2,2)$, $(2,1,2,2)$, or $(2,2,2,2)$ - there are seven candidates.
Input #2
1 1 100
Output #2
100
Input #3
31415 92653 58979
Output #3
469486242
题目信息
题号
arc113_d
时间限制
2 s
内存限制
1024 MB

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。