Compilare: main.cpp: In function 'void Dfs(int)': main.cpp:16:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for(int i = 0; i < a[nod].size(); i ++) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void Dfs2(int)': main.cpp:28:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | for(int i = 0; i < b[nod].size(); i ++) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:70:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 70 | for(int j = 0; j < v[i].size(); j ++) | ~~^~~~~~~~~~~~~