AtCoder Beginner Contest 094
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Problem Statement
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Let ${\rm comb}(n,r)$ be the number of ways to choose $r$ objects from among $n$ objects, disregarding order. From $n$ non-negative integers $a_1, a_2, ..., a_n$, select two numbers $a_i > a_j$ so that ${\rm comb}(a_i,a_j)$ is maximized. If there are multiple pairs that maximize the value, any of them is accepted.
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Constraints
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$2 \leq n \leq 10^5$$0 \leq a_i \leq 10^9$$a_1,a_2,...,a_n$are pairwise distinct.- 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
a_1 a_2 ... a_n
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Output
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Print $a_i$ and $a_j$ that you selected, with a space in between.
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样例
Input #1
5
6 9 4 2 11
Output #1
11 6
$\rm{comb}(a_i,a_j)$ for each possible selection is as follows:
- $\rm{comb}(4,2)=6$
- $\rm{comb}(6,2)=15$
- $\rm{comb}(6,4)=15$
- $\rm{comb}(9,2)=36$
- $\rm{comb}(9,4)=126$
- $\rm{comb}(9,6)=84$
- $\rm{comb}(11,2)=55$
- $\rm{comb}(11,4)=330$
- $\rm{comb}(11,6)=462$
- $\rm{comb}(11,9)=55$
Thus, we should print $11$ and $6$.
Input #2
2
100 0
Output #2
100 0
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。