Compilare: main.cpp: In function 'void dfs(int, int, int)': main.cpp:25:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for (int i = 0; i < v[x].size(); i++) | ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:52:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for (i = 0; i < cb.size(); i++, fout << "\n") | ~~^~~~~~~~~~~ main.cpp:56:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for (j = 1; j < cb[i].size(); j++) | ~~^~~~~~~~~~~~~~