200951: [AtCoder]ARC095 D - Binomial Coefficients
Memory Limit:256 MB
Time Limit:2 S
Judge Style:Text Compare
Creator:
Submit:0
Solved:0
Description
Score : $400$ points
Problem Statement
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.
Constraints
- $2 \leq n \leq 10^5$
- $0 \leq a_i \leq 10^9$
- $a_1,a_2,...,a_n$ are pairwise distinct.
- All values in input are integers.
Input
Input is given from Standard Input in the following format:
$n$ $a_1$ $a_2$ $...$ $a_n$
Output
Print $a_i$ and $a_j$ that you selected, with a space in between.
Sample Input 1
5 6 9 4 2 11
Sample 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 $6$.
Sample Input 2
2 100 0
Sample Output 2
100 0