Compilare: main.cpp: In function 'std::vector<std::vector<int> > solve(const std::vector<std::vector<int> >&, const std::vector<int>&)': main.cpp:49:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | if (dist == c.size()) | ~~~~~^~~~~~~~~~~ main.cpp:35:9: warning: unused variable 'k' [-Wunused-variable] 35 | int k = c.size(); | ^