Compilare: main.cpp: In function 'int main()': main.cpp:62:35: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 62 | for(int i=1;i<=M && sol.size()<=n-1;i++){ | ~~~~~~~~~~^~~~~ main.cpp:71:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 71 | for(int i=0;i<sol.size();++i) | ~^~~~~~~~~~~