Compilare: main.cpp: In function 'void dfs(int)': main.cpp:136:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 136 | for(int i=0;i<v[x].size();i++){ | ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:153:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 153 | for(int j=0;j<v[i].size();j++){ | ~^~~~~~~~~~~~