显示代码纯文本
#include<algorithm>
#include<iostream>
#include<cstring>
#include<cstdio>
using namespace std;
inline int read(){
int sum(0);
char ch(getchar());
for(;ch<'0'||ch>'9';ch=getchar());
for(;ch>='0'&&ch<='9';sum=sum*10+(ch^48),ch=getchar());
return sum;
}
int n;
int a[105];
inline int gg(){
freopen("random.in","r",stdin);
freopen("random.out","w",stdout);
n=read();
for(int i=1;i<=n;i++)
a[i]=read();
sort(a+1,a+n+1);
int size(unique(a+1,a+1+n)-a-1);
printf("%d\n",size);
for(int i=1;i<=size;i++)
printf("%d ",a[i]);
return 0;
}
int K(gg());
int main(){;}