#include<iostream>
#define ARR_LEN 5
using namespace std;
int main()
{
int int_arr[ARR_LEN], k, min, max, x, temp, i;
for(i=0; i<ARR_LEN; i++)
cin>>int_arr[i];
cout<<"Enter k: ";
cin>>k;
min = (1<<k)-1;
max = min<<(ARR_LEN-k);
for(x=min; x<=max; x=((x+(x&(-x)))|(((x^(x+(x&(-x))))>>2)/(x&(-x)))) )
{
temp = x;
i = 0;
while(temp)
{
if(temp&1)
cout<<int_arr[i]<<" ";
i++;
temp = temp>>1;
}
cout<<endl;
}
return 0;
}
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