#include<iostream>
#include<string>
using namespace std;
class ARR
{
public:
ARR(
int x[],
int size):m(size)
{
a=
new int[m];
for(
int i=
0; i<m; i++)
a[i]=x[i];
}
void delsame()
{
int top=
0;
int *newArr=
new int[m];
for(
int i=
0; i<m-
1; i++)
{
if(a[i]!=a[i+
1])
newArr[top++]=a[i];
}
if(newArr[top-
1]!=a[m-
1])
newArr[top++]=a[m-
1];
m=top;
a=newArr;
delete[] newArr;
}
void show()
{
for(
int i=
0; i<m; i++)
cout<<a[i]<<
" ";
cout<<endl;
}
private:
int m;
int *a;
};
int main()
{
int n,*s;
while(
cin>>n)
{
s=
new int[n];
for(
int i=
0; i<n; i++)
cin>>s[i];
ARR test(s,n);
test.delsame();
test.show();
delete[] s;
}
return 0;
}
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