combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:26:7: error: 'class std::vector<char>' has no member named 'pb'
26 | a.pb(*it);
| ^~
combo.cpp:28:7: error: 'class std::vector<char>' has no member named 'pb'
28 | a.pb(*it);
| ^~
combo.cpp:30:7: error: 'class std::vector<char>' has no member named 'pb'
30 | a.pb(*it);
| ^~
combo.cpp:32:9: error: 'veci' was not declared in this scope
32 | veci was(3);
| ^~~~
combo.cpp:35:19: error: 'was' was not declared in this scope
35 | while(was[key]) key = rand() % 3;
| ^~~
combo.cpp:40:13: error: 'was' was not declared in this scope
40 | was[key] = 1;
| ^~~