#include <iostream>
using namespace std;
int main() {
int x[] = {10,20,30,40};
int y[] = {10,20,30,40};
int *a = &x[0];
int *b = &y[0];
a++;++*b;*a++;b++;a++;
*a = *(--b) + (*a--);
b++;
*b = *(--a) + (++*b);
for (int i= 0; i<4; i++)
{
cout<<x[i]<<" ";
cout<<y[i]<<" ";
}
// your code goes here
return 0;
}
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