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- #include <iostream>
- #include <cstring>
- using namespace std;
- int main()
- {
- int n = 3;
- for(int i = 0; i < (1 << n); i++) {
- for(int j = 0; j < n; j++) {
- if(i & (1 << j)) {
- cout << j + 1 << " ";
- }
- }
- cout << endl;
- }
- return 0;
- }
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