Anna.cpp: In function 'std::pair<std::vector<int>, std::vector<int> > Anna(long long int)':
Anna.cpp:18:18: warning: control reaches end of non-void function [-Wreturn-type]
18 | std::vector<int> X;
| ^
Bruno.cpp: In function 'long long int Bruno(std::vector<int>)':
Bruno.cpp:13:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
13 | for (i = 1; i < u.size(); i++)
| ~~^~~~~~~~~~
Bruno.cpp:25:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
25 | for (i = 1; i < u.size()/2; i++)
| ~~^~~~~~~~~~~~
Bruno.cpp:33:32: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
33 | int cc = u.back() - (u.size() == c ? 0 : u[u.size() - 1 - c]);
| ~~~~~~~~~^~~~
Bruno.cpp: At global scope:
Bruno.cpp:7:5: warning: '{anonymous}::variable_example' defined but not used [-Wunused-variable]
7 | int variable_example = 0;
| ^~~~~~~~~~~~~~~~