Compilare: main.cpp: In function 'void Dfs(int, int)': main.cpp:19:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for(int i=0;i<ad[nod].size();++i){ | ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:62:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for(int i=0;i<sol.size();++i){ | ~^~~~~~~~~~~ main.cpp:63:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | for(int j=0;j<sol[i].size();++j) | ~^~~~~~~~~~~~~~