AtCoder Regular Contest 165
B
Sliding Window Sort 2
AtCoder
⌀ 1364
原题
← AC →
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Problem Statement

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You are given a permutation $P=(P_1,P_2,\dots,P_N)$ of integers from $1$ to $N$ and an integer $K$.

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Consider the following operation on the permutation $P$.

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  • Choose an integer $i$ such that $1 \leq i \leq N-K+1$, and sort $P_i,P_{i+1},\dots,P_{i+K-1}$ in ascending order. That is, let $(x_1,x_2,\dots,x_K)$ be the result of arranging $P_i,P_{i+1},\dots,P_{i+K-1}$ in order from smallest to largest, and replace $P_{i+j-1}$ with $x_j$ for each $1 \leq j \leq K$.
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Find the lexicographically largest permutation that can be obtained by performing the above operation on $P$ exactly once.

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What is lexicographical order on sequences? A sequence $S = (S_1,S_2,\ldots,S_{|S|})$ is lexicographically smaller than $T = (T_1,T_2,\ldots,T_{|T|})$ when 1. or 2. below holds. Here, $|S|$ and $|T|$ denotes the lengths of $S$ and $T$, respectively. $|S| \lt |T|$ and $(S_1,S_2,\ldots,S_{|S|}) = (T_1,T_2,\ldots,T_{|S|})$. There is an integer $1 \leq i \leq \min\lbrace |S|, |T| \rbrace$ that satisfy both of the following: $(S_1,S_2,\ldots,S_{i-1}) = (T_1,T_2,\ldots,T_{i-1})$. $S_i$ is smaller than $T_i$ (as a number).

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Constraints

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  • $1 \leq K \leq N \leq 2 \times 10^5$
  • $1 \leq P_i \leq N$
  • $(P_1,P_2,\dots,P_N)$ is a permutation of integers from $1$ to $N$.
  • 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 K
P_1 P_2 \dots P_N

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Output

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Print the lexicographically largest permutation that can be obtained by performing the above operation on $P$ exactly once, with spaces in between.

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样例

Input #1
4 3
2 1 4 3
Output #1
2 1 3 4
If you perform the operation with $i=1$, we have $(P_1,P_2,P_3)=(2,1,4)$, and sorting it in ascending order yields $(1,2,4)$. Thus, the operation replaces $P_1,P_2,P_3$ with $1,2,4$, respectively, resulting in $P=(1,2,4,3)$. Similarly, if you perform the operation with $i=2$, $P$ becomes $(2,1,3,4)$. The lexicographically greater between them is $(2,1,3,4)$, so the answer is $(2,1,3,4)$.
Input #2
5 1
3 1 4 2 5
Output #2
3 1 4 2 5
Input #3
20 7
9 4 3 1 11 12 13 15 17 7 2 5 6 20 19 18 8 16 14 10
Output #3
9 4 3 1 11 12 13 15 17 7 2 5 6 8 18 19 20 16 14 10
题目信息
题号
arc165_b
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。