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  1. #include <iostream>
  2. #include <bitset>
  3.  
  4. int main() {
  5. for (int i = 0; i != 16; ++i) {
  6. std::cout << std::bitset<4>(i) << "\n";
  7. }
  8. }
Success #stdin #stdout 0s 15240KB
stdin
Standard input is empty
stdout
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111