coins.cpp: In function 'std::vector<int> coin_flips(std::vector<int>, int)':
coins.cpp:8:18: error: 'flips' is not a member of 'std'
8 | std::flips.push_back(i);
| ^~~~~
coins.cpp:9:45: error: expected ';' before 'std'
9 | else if(!(c & (1 << i) && b[i] == 1)
| ^
| ;
10 | std::flips.push_back(i);
| ~~~
coins.cpp:11:10: error: 'flips' is not a member of 'std'
11 | std::flips.push_back(7);
| ^~~~~
coins.cpp:11:28: error: expected ')' before ';' token
11 | std::flips.push_back(7);
| ^
| )
coins.cpp:9:16: note: to match this '('
9 | else if(!(c & (1 << i) && b[i] == 1)
| ^