Compilare: main.cpp: In function 'int main()': main.cpp:31:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::tuple<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for(int i=0;i<graf[n].size();i++){ | ~^~~~~~~~~~~~~~~ main.cpp:37:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::tuple<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for(int i=0; i<sol.size(); i++){ | ~^~~~~~~~~~~