Compilare: main.cpp: In function 'int main()': main.cpp:37:17: warning: comparison of integer expressions of different signedness: 'std::queue<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 37 | if (q.size()<k) {cout<<-1; return 0;} | ~~~~~~~~^~ main.cpp:38:20: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 38 | if (have.size()==k) {cout<<k; return 0;} | ~~~~~~~~~~~^~~ main.cpp:48:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::set<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | if (c==have.size()) | ~^~~~~~~~~~~~~ main.cpp:63:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::set<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | else if (c<have.size()) | ~^~~~~~~~~~~~ main.cpp:73:24: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 73 | if (have.size()==k) | ~~~~~~~~~~~^~~