Compilare: main.cpp: In function 'void dfs(int, 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 < v[nod].size(); ++i) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:56:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for(int j = 0; j < sol[i].size(); ++j) | ~~^~~~~~~~~~~~~~~