Compilare: main.cpp: In function 'int main()': main.cpp:25:35: warning: comparison of integer expressions of different signedness: 'std::set<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 25 | for(int i = 0;i < r && st.size() >= x;++i) | ~~~~~~~~~~^~~~ main.cpp:36:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(int j = 0;j < v.size();++j) | ~~^~~~~~~~~~