Compilare: main.cpp: In function 'int main()': main.cpp:27:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for(int j = 0;j < tmp.size();++j) | ~~^~~~~~~~~~~~ main.cpp:31:38: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 31 | if(av.size() > k) | ~~~~~~~~~~^~~