Compilare: main.cpp: In function 'bool bkt(int, int)': main.cpp:37:33: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 37 | if(v == 1 && sol.size() == 2 * n) { | ~~~~~~~~~~~^~~~~~~~ main.cpp: In function 'int main()': main.cpp:85:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | for(int i = 1; i < sol.size(); i++) | ~~^~~~~~~~~~~~