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May 23rd, 2019
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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. int n;
  4. int main() {
  5. cout<<"n= ";
  6. cin >> n;
  7. for (int i = 1; i < (1 << n); i++)
  8. {
  9. for (int j = 0; j < n; j++)
  10. if (i & (1 << j))
  11. cout << j + 1 << ' ';
  12. cout << '\n';
  13. }
  14. return 0;
  15. }
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