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#include <iostream> #include <vector> #include <cstring> #include <algorithm> #include <stack> using namespace std; int main() { int n = 3; for(int bitmask = 0; bitmask < (1 << n); bitmask++) { // (1 << n) = power(2, n) for(int bit = 0; bit < n; bit++) { if(bitmask & (1 << bit)) { cout << bit + 1 << " " ; } } cout << endl; } return 0; }
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