Compilare: main.cpp: In function 'int main()': main.cpp:28:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | for(int j = 0;j < free[i].size();++j) | ~~^~~~~~~~~~~~~~~~ main.cpp:32:38: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 32 | if(av.size() > k) | ~~~~~~~~~~^~~