链接:https://codeforces.com/contest/1300/problem/C
Anu has created her own function ff: f(x,y)=(x|y)−yf(x,y)=(x|y)−y where || denotes the bitwise OR operation. For example, f(11,6)=(11|6)−6=15−6=9f(11,6)=(11|6)−6=15−6=9. It can be proved that for any nonnegative numbers xx and yy value of f(x,y)f(x,y) is also nonnegative.
She would like to research more about this function and has created multiple problems for herself. But she isn't able to solve all of them and needs your help. Here is one of these problems.
A value of an array [a1,a2,…,an][a1,a2,…,an] is defined as f(f(…f(f(a1,a2),a3),…an−1),an)f(f(…f(f(a1,a2),a3),…an−1),an) (see notes). You are given an array with not necessarily distinct elements. How should you reorder its elements so that the value of the array is maximal possible?
Input
The first line contains a single integer nn (1≤n≤1051≤n≤105).
The second line contains nn integers a1,a2,…,ana1,a2,…,an (0≤ai≤1090≤ai≤109). Elements of the array are not guaranteed to be different.
Output
Output nn integers, the reordering of the array with maximum value. If there are multiple answers, print any.
Examples
input
Copy
4 4 0 11 6
output
Copy
11 6 4 0
input
Copy
1 13
output
Copy
13
Note
In the first testcase, value of the array [11,6,4,0][11,6,4,0] is f(f(f(11,6),4),0)=f(f(9,4),0)=f(9,0)=9f(f(f(11,6),4),0)=f(f(9,4),0)=f(9,0)=9.
[11,4,0,6][11,4,0,6] is also a valid answer.
#include<bits/stdc++.h>
using namespace std;
long long n,t,s,k,max1;
struct node{
int s[100];
int x;
int sum;
int id;
}a[200005];
bool cmp(node q,node g)
{
int k1=q.sum;
int k2=g.sum;
while(q.s[k1]==g.s[k2]&&k1>1&&k2>1)
{
k1--;
k2--;
}
if(q.s[k1]!=g.s[k2])
return q.s[k1]>g.s[k2];
else
return q.sum>g.sum;
}
map<long long,long long>m;
int main()
{
cin>>n;
for(int i=1;i<=n;i++)
{
cin>>a[i].x;
k=a[i].x;
int j=1;
while(k)
{
if(k%2==1)
{
m[j]++;
}
k/=2;
j++;
}
}
max1=0;
for(int i=1;i<=n;i++)
{
k=a[i].x;
int j=1,p=0;
while(k)
{
if(k%2==1)
{
if(m[j]==1)
{
p++;
a[i].s[p]=j;
}
}
k/=2;
j++;
}
a[i].sum=p;
}
sort(a+1,a+1+n,cmp);
for(int i=1;i<=n;i++)
{
cout<<a[i].x<<" ";
}
}

给定一个包含非负整数的数组,需要重新排列数组元素以使Anu定义的函数f(x,y)=(x|y)-y的最大化。f函数基于位或运算。找出能最大化该函数值的数组重排顺序。"
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