Compilare: main.cpp: In function 'int main()': main.cpp:36:17: warning: comparison of integer expressions of different signedness: 'std::queue<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 36 | if (q.size()<k) {cout<<-1; return 0;} | ~~~~~~~~^~ main.cpp:37:20: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 37 | if (have.size()==k) {cout<<k; return 0;} | ~~~~~~~~~~~^~~ main.cpp:47:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::set<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | if (c==have.size()) | ~^~~~~~~~~~~~~ main.cpp:62:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::set<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | else if (c<have.size()) | ~^~~~~~~~~~~~ main.cpp:72:24: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 72 | if (have.size()==k) | ~~~~~~~~~~~^~~