cluedo.cpp: In function 'void Solve()':
cluedo.cpp:3:5: error: 'vector' was not declared in this scope
3 | vector <int> va, vb, vc;
| ^~~~~~
cluedo.cpp:3:13: error: expected primary-expression before 'int'
3 | vector <int> va, vb, vc;
| ^~~
cluedo.cpp:5:9: error: 'va' was not declared in this scope
5 | va.push_back(i);
| ^~
cluedo.cpp:7:9: error: 'vb' was not declared in this scope
7 | vb.push_back(i);
| ^~
cluedo.cpp:9:9: error: 'vc' was not declared in this scope
9 | vc.push_back(i);
| ^~
cluedo.cpp:12:27: error: 'va' was not declared in this scope
12 | int clue = Theory(va.back(), vb.back(), vc.back());
| ^~
cluedo.cpp:12:38: error: 'vb' was not declared in this scope
12 | int clue = Theory(va.back(), vb.back(), vc.back());
| ^~
cluedo.cpp:12:49: error: 'vc' was not declared in this scope
12 | int clue = Theory(va.back(), vb.back(), vc.back());
| ^~
cluedo.cpp:12:20: error: 'Theory' was not declared in this scope
12 | int clue = Theory(va.back(), vb.back(), vc.back());
| ^~~~~~