Compilare: main.cpp: In function 'void dfs(int, std::vector<int>&, std::vector<std::vector<int> >&)': main.cpp:12:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 12 | for(int i = 0; i < adjaux[x].size(); i++) | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:44:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | for(int j = 0; j < adj[i].size(); j++) | ~~^~~~~~~~~~~~~~~ main.cpp:61:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for(int i = 0; i < ans.size(); i++) | ~~^~~~~~~~~~~~ main.cpp:63:26: 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 < ans[i].size(); j++) | ~~^~~~~~~~~~~~~~~