Compilare: main.cpp: In function 'int main()': main.cpp:22:23: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 22 | while(s.size()<k+2) | ~~~~~~~~^~~~ main.cpp:32:23: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 32 | while(s.size()!=k+1) | ~~~~~~~~^~~~~