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#include <iostream>

#include <set>

using namespace std;

void rm_dup_array(int a[], int len, int*& b, int& new_len)

{

set<int> s;

new_len = 0;

int i;

for(i=0; i<len; i++) {

s.insert(a[i]);

}

auto it = s.begin();

while(it!=s.end()) {

new_len++;

it++;

}

b = new int[new_len];

it = s.begin();

i=0;

for(;it!=s.end(); it++) {

b[i] = *it;

i++;

}

}

int main()

{

int a[] = {2,7,2,5,1,5};

int len = sizeof(a)/sizeof(a[0]);

int *b = NULL;

int new_len = 0;

rm_dup_array(a,len, b, new_len);

for(int i=0; i<new_len; i++) {

cout << b[i] << " ";

}

cout << endl;

delete[] b;

}